2. n. acronym for "buoyancy control device" used in scuba diving, a vest that can be inflated or deflated while underwater to control a diver's depth.
2. "Shit, my god-damn BCD has a hole in it. If I dive with this POS on, I'll sink right to the bottom."
It originates from the film "Black Hawk Down", where a series of events lead to a helicopter being taken down. B.C.D is a verb that can be used to describe a persons actions, which usually relates to sexual attraction, or just plain attraction. Similar to "Black Hawk Down", the use of the word B.C.D can signify that you want to "take down" the subject that you're talking about.
Derek: Would you B.C.D that?!
Sean: Yeeeeee!! I'd B.C.D that, anyday.
Derek: I'd BCD that ass
yeah that B.C.D. is forever fierce.