1. n. (military) acronym for "bad conduct discharge" as defined by the Uniform Code of Military Justice for US military servicemen, also known unofficially as the "Big Chicken Dinner" as slang for the same discharge.

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.
1. "Corporal Smith bashed Lieutenant Jones in the fucking pie hole right in front of the general. Stupid shitbird is gonna get his BCD for sure."

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."
by Marc February 14, 2004
Binary coded decimal. A numbering system where each digit is represented with 4 bits.
0 = 0000
1 = 0001
2 = 0010
3 = 0011
9 = 1001
10 = 0001 0000

^You get the idea.
by D1 March 27, 2005
"Butt Chugging Device"

A device used for the purpose of administering an alcoholic beverage into the anus.

Can refer to a Guinn Box, a bicycle pump, or any other device fitting the above criteria.
Joe: Hey Tim, can I borrow your bicycle pump for a few minutes?
Tim: Sure thing pal! Planning an evening of butt-chugging I see? Have a good time and be safe!
Joe: Thanks guy, I'll have your BCD back in no time.
by Fliff Queen November 26, 2015
B.C.D is an abbreviation for "Black Cock Down".
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.
* girl walks by in hall*
Derek: Would you B.C.D that?!
Sean: Yeeeeee!! I'd B.C.D that, anyday.
by Paula O. Schofield May 13, 2008
The term originates from the movie Black Hawk Down, where a helicopter drops a Delta Force team to take down enemies. Black Cock Down is when you take down a girl with your cock. You would basically replace "I'd tap that" with "I'd BCD that"
Sean: That girl over there is pretty hot
Derek: I'd BCD that ass
by Sean J. May 04, 2008
short acronym for the term Bitch Cunt Diva. A situation where a person is being totally unreasonable, extremely superficial or shallow or even rude. Term can also can be used in a positive manner when someone is giving you life on the dance floor, is just being straight fierce or just has that nasty bounce.
did you see that girl giving me life?! i wish i could say i don't see her but she is just everything!

yeah that B.C.D. is forever fierce.
by spicka January 19, 2011
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