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The act of masturbating in the tune of the theme song of Teenage Mutant Ninja Turtles. Finally you ejaculate as the theme song says "Turtles in a Half Shell."
Me and my girlfriend were messing around and I "Kowabunga Fapped" in her face.
by Nukeman June 13, 2010
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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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