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Top definition
monkey on a trapoline
When a man stretches out his
scrotum sack
and bounces his penis
off it
like a monkey jumping on a
trampoline
. This technique was created by two brothers from Mass.
Jack loves playing with his
sack
, his
favorite
manuver is
the monkey
on a trapoline.
by
Bro#2
January 12, 2006
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monkey on a trapoline
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