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Somebody who is fast and nasty. They are quick to jump into bed with you. They like getting down and dirty.
Kristin is a total fastnasty, especially when it comes to getting with Shane.
by kKRASH & gBOWL May 19, 2009
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Sep 8 Word of the Day
A casual invitation / threat used by an individual that is not afraid of fucking someone up.
PAUL: I'm going to beat your ass.

JACK: Fuck around and find out, fool!
by NX STARCHILD October 16, 2020
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