B-Card
When you let your butt get penetrated for the first time. It's like your V-Card, but way more painful and way less cool.
My B-Card died the day I tried to fit a pizza slice up my butt.
I got my B-Card taken by a guy who smelled like old socks and regret.
My mom said I'd get my B-Card back when I stop eating tacos at 3 AM.