Funny
Happy birthday to the sister whose laugh I can identify across a crowded room — usually because it's at my expense.
Funny · 104 cards
Sister Birthday Funny Wishes
Your sister’s birthday is the perfect chance to tease her with laughter and love all at once. These funny birthday wishes for your sister blend clever jokes with genuine affection so she feels truly celebrated. Pick one that matches her sense of humor, personalize it in seconds, and send a postcard to brighten her special day with a free online greeting card she’ll keep forever.
Funny
Sister, you're another year more impressive, which I will continue to grudgingly admit in writing only.
Funny
Happy birthday — childhood with you was a chaotic sitcom, and the spin-off years are aging surprisingly well.
Funny
Sister, happy birthday — you're the only person allowed to roast me publicly, and you exercise the right liberally.
Funny
Happy birthday to the sister who's been borrowing my stuff for decades — at this point, just keep it all.