20+ Funny Birthday Wishes for Your Sister

Is today your “favorite” sister’s birthday?

Looking for a funny way to tell them “Happy Birthday?”

Take a look at our 20+ funny birthday wishes for sisters – 100% unique – that are GUARANTEED to get some laughs!

20+ Funny Birthday Wishes for Your Sister
Memes and Quotes

1. I don’t always text my sister. But when I do, it’s usually to remind her that she’s another year older! Happy birthday!

2. Happy birthday! Growing up, mom liked calling you her little helper. I always thought of you more as “assister!”

3. There are some people in life you’re blessed with knowing, and others – like sisters – that you’re stuck with! Happy birthday!

4. Happy birthday! We can both agree mom and dad made a few mistakes growing up. Of all their mistakes, you’re my favorite!

5. Did you hear Russell Crowe’s sister once went on a date with a cannibal? He was Gladiator (glad he ate her!) Happy birthday!

6. Happy birthday! Thanks for always being older than me!

7. Did you hear about the sister that wanted to marry a postman? Her parents didn’t “letter!” Happy birthday!

8. Happy birthday! Some sisters are nosey and up in your business, while others have the sense to lock themselves away in a convent!

9. I’d make a joke about your age, but I’m older than you! Happy birthday sis!

10. Happy birthday! We may have fought like cats and dogs growing up, but I still love you like the annoying sister you are!

11. Before you were born, I had wished to have a baby brother! Yeah, thanks for that… Happy birthday!

12. Happy birthday! I remember how much I would miss you when we were smaller. My aim has gotten a lot better now…

13. Did you know that Cardi-B has an athletic sister? Her name is Cardi-O! Happy birthday!

14. Happy birthday to my favorite half-sister! It’s really too bad about that shark attack…

15. What did the cell say to his sister after she stepped on his foot? Ouch, mitosis! Happy birthday!

16. Happy birthday! Always know that I will be there to pick you up when you fall… right after I finish laughing!

17. They say that wonderful family is one of life’s best gifts, so… you’re welcome! Happy birthday!

18. Happy birthday! I’d invite you over to celebrate but “no sisters allowed” in my fort!

19. Did you know that if you ever got a job at Walgreens, you’d be a “pharma-sister!” Happy birthday!

20. Happy birthday to the sister that I REALLY wish was from another mister (or family/state/continent!) Just kidding, love you sis!