Top Definition
An expression said to someone who is about to do something which will put him/her at great risk.
Mark: "Hey man, did you sell your plasma screen TV yet?"
Johnny: "Yeah, I've got a guy who wants to buy it. I'm meeting him on a corner in East Oakland tomorrow night at 1am."
Mark: "Good luck with that. Nice knowing you."
by Nicholas D January 13, 2012

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