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In Cleveland, 9 times out of ten it means to lie, front or bullshit. In noun form, a liar, or bullshitter.
Girl 1: I went to the mall and this dude gave me a discount on my Forces cuz I told him he was cute.

Girl 2: You cappin'!

- - - - - - - - -

Boy 1: Last Saturday, I got pussy from 3 different girls.

Boy 2: Man, youse a cap.
by AUTOPSY January 10, 2007
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If the bitch comes around I'm gonin' cap him.
by hunter July 19, 2004
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Stands for 'Copy and paste'
Used on MSN and other instant messenger services when you want the person you are talking to to copy and paste a section of their conversation with another person into your conversation.

Person X Says:
"This guy is being really annoying. He wont stop complaining!"
Person Y Says:
"Cap it to me"
by AshDav January 16, 2009
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