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1 definition by Shannon A.

 
1.
A penis that has an extremely big head but skinny shaft. Pendulum Penii swing like a clock's pendulum when the possessor walks with a normal gait.
Man, did you see Jason in the locker room? He has a fucking pendulum between his legs. Every step it swung from 1 knee to the other.
by Shannon A. February 28, 2008
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