Collection: Funny Sister Birthday Cards

Welcome to our Wind Up Merchant Cards — a collection specifically for taking the piss out of the people you love. From embarrassing childhood memories and sibling abuse to ridiculous TV and film references, these are cards designed to get a laugh, an eye roll or an immediate “you absolute dickhead.”

Perfect for brothers, sisters, mates, partners and anyone whose birthday simply cannot be allowed to pass peacefully.

👉 Browse more Funny Birthday Cards Here
👉 Browse more Funny Boyfriend Cards Here
👉 Browse more  Funny Girlfriend Cards Here
👉 Browse more Bad Advice Birthday Cards
👉 Browse more Funny Best Friend Cards Here