1 definition by Sean J.

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 4, 2008
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