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The "fun uncle" is an inappropriate jest move that involves purposefully flipping one's manhood out of one's pants in front of others as if by accident to attempt to shock, awe, or make laugh.
When the teacher stepped out of class, I had to see Merlin's Schlong as he took the opportunity to give us all the Fun Uncle.
by pythagorean January 16, 2015
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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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