KBO

Knock Bitches Out.

Most likely used in game situations for pump-up purposes.

Girl 1: Let's win this game!
Girl 2: KBO?
Girl 1: Hell yeahhh.

by hi9349238432875 October 14, 2010

kbo

Winston Churchill (British Prime Minister during WWII) ended almost every phonecall with KBO.
KBO is an acronym for "Keep Buggering On"

Winston Churchill: Let's have a drink or two some time after this terrible war is over.
Franklin D. Roosevelt: That would be great fun!
Winston Churchill: Right then, KBO.

by Ulv88 December 10, 2006