b.c.

Abbreviation for "birth control (pills)," used most commonly by girls.

Girl 1: Oh shit, I forgot to bring my b.c.! This is going to ruin my vacation.
Girl 2: Don't worry; we passed a Planned Parenthood on the way here. They're bound to have some free b.c. lying around.

by slammdunc23 February 11, 2011