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(v.) To shoot someone with a firearm. This term came into coinage in the British tabloids in the 1960s, and world war I before that (where it was mainly military speak for a machine gunner, see b))
a) The paramilitrist said he was going to gun down a politician.

b) You don't want to go through that gap, there's a gun down in there.
by Kung-Fu Jesus May 12, 2004
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