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1.
any male sexual organ which is bent, kinked, curved or otherwise humorously deformed.

Boomerang-Wang is a noun
Ben has a small, purple Boomerang-Wang
by Travis Lally June 22, 2005
 
2.
a penis that curves to the left, to the right, up, or down.
He has a boomerang wang so it hits the right spot every time!
by jaw breaker May 26, 2008