• May include: A square greeting card with a blue textured background and white text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card is placed on top of a brown envelope.
  • May include: An informational graphic with a cream background and brown text. It features icons of an envelope, a calendar, a rocket, and a delivery truck. The text outlines delivery information, Royal Mail 2nd class service, and postage upgrade options for faster arrival times.
  • May include: A square greeting card with a textured green background and black text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card has a white border.
  • May include: A square greeting card with a bright yellow background and black text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card has a textured, painted-style border.
  • May include: A square greeting card with a bright yellow front featuring black text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card is placed against a brown envelope.
  • May include: A white greeting card with black printed instructions regarding personalization options, font choices, and shipping details. The card includes a small chart in the bottom right corner displaying six distinct font styles labeled Font 1 through Font 6.
  • May include: A rectangular brown kraft paper envelope with the word Name printed in black on the front. The text on the right side explains that cards sent directly to the recipient include a personalized envelope with a matching font.
  • May include: A beige informational graphic titled Delivery Info featuring text regarding shipping options for UK and international customers, including Royal Mail services, and a bright red cylindrical British post box on the right side.
  • May include: A rectangular card with torn edges featuring the text Jack Rabbit Slims and JRS in a circle. The text lists product details including 300gsm cardstock, a recycled kraft envelope, a cello sleeve, and board-backed envelope packaging.
  • May include: A square greeting card with a blue textured background and white text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card is placed on top of a brown envelope.
  • Product video
  • May include: An informational graphic with a cream background and brown text. It features icons of an envelope, a calendar, a rocket, and a delivery truck. The text outlines delivery information, Royal Mail 2nd class service, and postage upgrade options for faster arrival times.
  • May include: A square greeting card with a textured green background and black text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card has a white border.
  • May include: A square greeting card with a bright yellow background and black text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card has a textured, painted-style border.
  • May include: A square greeting card with a bright yellow front featuring black text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card is placed against a brown envelope.
  • May include: A white greeting card with black printed instructions regarding personalization options, font choices, and shipping details. The card includes a small chart in the bottom right corner displaying six distinct font styles labeled Font 1 through Font 6.
  • May include: A rectangular brown kraft paper envelope with the word Name printed in black on the front. The text on the right side explains that cards sent directly to the recipient include a personalized envelope with a matching font.
  • May include: A beige informational graphic titled Delivery Info featuring text regarding shipping options for UK and international customers, including Royal Mail services, and a bright red cylindrical British post box on the right side.
  • May include: A rectangular card with torn edges featuring the text Jack Rabbit Slims and JRS in a circle. The text lists product details including 300gsm cardstock, a recycled kraft envelope, a cello sleeve, and board-backed envelope packaging.
Report this item to Etsy

Funny Rude Birthday Card | Studies Have Shown People Who Swear | Sweary Adult Humour Card

JackRabbitSlimsStore  
5 out of 5 stars

Item highlights

  • Materials: Cardboard
  • Made to order

Seller's description

📮⚠️ Need your card within the next 7–10 days? Please consider upgrading your postage at checkout. Free Royal Mail 2nd Class delivery is included as standard. Etsy delivery dates are estimates only and cannot be guaranteed.

────────────────────

Studies have shown that people who swear are more intelligent… and this rude funny birthday card is the perfect way to prove it.
Designed for adults with a strong sense of humour, this bold, minimalist card delivers unapologetic sweary humour that’s guaranteed to get a laugh (and possibly a sharp inhale).

────────────────────

📮 Delivery Information
Need your order for a specific date?

We always aim to make and dispatch orders as quickly as possible however, delivery dates shown by Etsy are estimates generated by Etsy and are not guaranteed. Royal Mail delivery times are also estimates and can occasionally take longer than expected.
Unfortunately, we cannot guarantee delivery by a specific date unless a guaranteed delivery service has been selected.

If your order is required by a specific date, we strongly recommend upgrading your postage at checkout:

✅ Royal Mail 1st Class (+£1)
✅ Royal Mail Tracked 48
✅ Royal Mail Tracked 24

These services provide the best chance of your order arriving in time for birthdays, anniversaries and other important occasions.

Ordering through the Etsy app or on mobile?
Etsy doesn't always make postage upgrades obvious on mobile devices, so please double-check the delivery options available at checkout if you need your order by a particular date.

────────────────────

Personalised For You 🖊️
All wording can be customised, including names, dates, titles (Mam/Mum, Husband/Partner etc.) and pronouns. Simply add your requirements in the personalisation box when ordering.

────────────────────

Details 📐
Size - 12cm x 12cm
Card - Luxury matte 300gsm cardstock
Envelope - 100gsm kraft brown recycled gummed envelope

────────────────────

In the USA? 🌎
All card orders for the USA are sent via Royal Mail International Standard. Delivery typically takes 5–10 working days but can occasionally take longer.

Etsy delivery dates for international orders are estimates only and are not guaranteed.

────────────────────

If you'd like a different colour, variation or a completely custom design, please send us a message and we'll be happy to help.

Please note colours may vary slightly due to different device screens and settings.

────────────────────

Frequently Asked Questions ❓

Can I change the wording?
Yes! All wording can be customised.

Can I send the card directly to the recipient?
Absolutely. Just select "Send to recipient" when ordering.

Do you guarantee delivery dates?
No. Etsy delivery dates are estimates only and are not guaranteed.

View more

Item review

Why this review appears

All reviews are from verified buyers. This review is shown automatically based on factors like recency, whether it includes comments, your chosen language, and whether the rating reflects the typical experience with the shop.

“Lovely, good quality card, arrived quickly.”

Gwinny

8 days ago

View all

Only 2 left and in 2 carts

NowPrice:$5.57

Original Price: $6.20

10% off

•

Sale ends in 2 days

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  • Add your message & font choice (shown in example image)

    Please double check spelling as we'll print it as it's written

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You can only make an offer when buying a single item

Shipping & return policies
  • Cost to ship
    $5.92 to United States, 43215.

Reviews for this item

5.0

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.

(8 reviews)

5.0 Item quality
5.0 Shipping
5.0 Customer service
100% Buyers recommend
Filter by category
5 out of 5 stars 5 This item

Gwinny Oct 9, 2026

Lovely, good quality card, arrived quickly.

Gwinny Oct 9, 2026

Response from Danielle

Thank you for taking the time to leave a lovely review. I am so happy to hear you liked the card, found it to be of good quality and that it arrived quickly 😊

5 out of 5 stars 5 This item

Elizabeth Sep 24, 2026

Brilliant cards. Great humour. Made me laugh out loud!.

Elizabeth Sep 24, 2026

Response from Danielle

Thank you so much, Elizabeth! I’m so pleased the card made you laugh out loud! 😂 That’s exactly what I hope my funny cards will do. Thank you for your lovely review and support.

5 out of 5 stars 5 This item

Sharon Aug 30, 2026

Good comms from seller, fast delivery

Sharon Aug 30, 2026

Response from Danielle

Thank you so much, Sharon! I’m delighted you were happy with your card and the delivery. Thank you for taking the time to leave such lovely feedback, it’s very much appreciated 🥰

5 out of 5 stars 5 This item

Melodie Jun 8, 2026

Great card. If you are in the US make sure younordrr early because it is shipped internationally.

Melodie Jun 8, 2026

Response from Danielle

Thank you so much. I am pleased you like the card ☺️

Seller's description

Specifications

May include: A square greeting card with a blue textured background and white text that reads: Studies have shown people who swear are more intelligent than stupid motherfuckers! Happy Birthday! The card is placed on top of a brown envelope.

📮⚠️ Need your card within the next 7–10 days? Please consider upgrading your postage at checkout. Free Royal Mail 2nd Class delivery is included as standard. Etsy delivery dates are estimates only and cannot be guaranteed.

────────────────────

Studies have shown that people who swear are more intelligent… and this rude funny birthday card is the perfect way to prove it.
Designed for adults with a strong sense of humour, this bold, minimalist card delivers unapologetic sweary humour that’s guaranteed to get a laugh (and possibly a sharp inhale).

────────────────────

📮 Delivery Information
Need your order for a specific date?

We always aim to make and dispatch orders as quickly as possible however, delivery dates shown by Etsy are estimates generated by Etsy and are not guaranteed. Royal Mail delivery times are also estimates and can occasionally take longer than expected.
Unfortunately, we cannot guarantee delivery by a specific date unless a guaranteed delivery service has been selected.

If your order is required by a specific date, we strongly recommend upgrading your postage at checkout:

✅ Royal Mail 1st Class (+£1)
✅ Royal Mail Tracked 48
✅ Royal Mail Tracked 24

These services provide the best chance of your order arriving in time for birthdays, anniversaries and other important occasions.

Ordering through the Etsy app or on mobile?
Etsy doesn't always make postage upgrades obvious on mobile devices, so please double-check the delivery options available at checkout if you need your order by a particular date.

────────────────────

Personalised For You 🖊️
All wording can be customised, including names, dates, titles (Mam/Mum, Husband/Partner etc.) and pronouns. Simply add your requirements in the personalisation box when ordering.

────────────────────

Details 📐
Size - 12cm x 12cm
Card - Luxury matte 300gsm cardstock
Envelope - 100gsm kraft brown recycled gummed envelope

────────────────────

In the USA? 🌎
All card orders for the USA are sent via Royal Mail International Standard. Delivery typically takes 5–10 working days but can occasionally take longer.

Etsy delivery dates for international orders are estimates only and are not guaranteed.

────────────────────

If you'd like a different colour, variation or a completely custom design, please send us a message and we'll be happy to help.

Please note colours may vary slightly due to different device screens and settings.

────────────────────

Frequently Asked Questions ❓

Can I change the wording?
Yes! All wording can be customised.

Can I send the card directly to the recipient?
Absolutely. Just select "Send to recipient" when ordering.

Do you guarantee delivery dates?
No. Etsy delivery dates are estimates only and are not guaranteed.

  • Materials
    Cardboard

Delivery details and policies

  • Get it by
    Oct 22-Nov 3
  • Returns and exchanges
    Not accepted.
  • Ships from
    United Kingdom
  • Cost to ship
    $5.92 to United States, 43215

    There was a problem calculating your shipping. Please try again.

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Star Seller

This seller consistently earned 5-star reviews, shipped orders on time, and replied quickly to messages.

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Meet your seller

JackRabbitSlimsStore
Danielle
JackRabbitSlimsStore ·

Newcastle upon Tyne, United Kingdom

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 4.9
·
4.2k sales
·
3 years on Etsy

Usually responds in a few hours

Smooth shipping Has a history of shipping on time with tracking.

Speedy replies Has a history of replying to messages quickly.

Rave reviews Average review rating is 4.8 or higher.

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Listed on Oct 17, 2026
31 favorites
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