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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."
bcd by Marc February 14, 2004
BCD stands for Bareback Cum Dumpster. It is often used to describe an unfaithful Adultress who has had continued unprotected intercourse with a plethora of inferior, degenerate males.
That BCD whore of a wife gave me an STD she got from one of her fuckbois.

The BCD called me to hookup.

I wouldn’t touch that BCD with your dick.

Don’t be such a damn BCD!
BCD by BFCisaBCD November 19, 2019
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.
BCD by D1 March 27, 2005
Blame, complain, and defend. When someone refuses to take responsibility for their own actions.
Teacher: why were you so late to class
Student: you didn’t tell me what time I had to be here today
Teacher: talk about a BCD
BCD by RIPJAH October 19, 2019
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
BCD by Sean J. May 18, 2008
BCD - Blue Creamy Discharge. When a woman gots issues down in the danger zone, a blue creamy discharge can form and start to drip out. Although there is no cure for BCD, it is more closely related to chlymaida, which has a cure through medicine.
JoAnna did't know she had BCD till a guy went south and came up with a hand full of it.
BCD by YaYa at Whizzer May 15, 2009