Little Man on the Trampoline

The act of grabbing the sides of your scrotum and pulling it taught whilst you bounce your penis up and down on it.
My girl likes it when I show her the "little man on the trampoline"
by Steve-o and Tim November 06, 2008
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man trampoline

when having sex a girl is bouncing on a man
going up and down on a dick is a man trampoline
by im your dad bobby December 05, 2019
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