Top Definition
The often confusing bulge on some womens pants, commonly mistaken for a penis bulge.
"Yo Nick, did you see Patty on register 7?"
"Bro, idk if thats a girl or not, did you see that clambump??"
door StreetBikeTakeover 14 juni 2009

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A term used to describe the act of lesbianism
Mellisa and Sarah were engaged in a hot and steamy clambump.
door Jeff Mills 7 juli 2006

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Another term for scissoring.
Hey babe, wanna clam bump?
door King Clam Bump 21 juli 2013

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