A figure of speech used to let someone know that their butt crack is showing a lot or a little.
by Mr. Terrence L. Trezvant August 8, 2006
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Expression used to let s.o. know their butt crack is showing.
The plumber is working underneath the sinkwith his butt in the air.
You come in: "Dude, crack kills! Pull 'em jeans up!"
by Mr. Mouse November 29, 2004
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If someone says "Crack Kills," it means you're mooning them and they'd appreciate it if you'd pull your pants up.
Mike:Crack Kills!
by Random Rokker People June 21, 2009
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