look up any word, like cunt:
Essentially, anal sex.

A crude and somewhat chauvinistic analogy which compares making love to a girl to playing a record. The a-side is 'regular' or vaginal intercourse, so it therefore follows that the b-side is anal intercourse.
"So did you flip her over and play the b-side?"

"Oh yeah."
by juba73 January 12, 2005