1 definition by pythagorean

Top Definition
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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