A broken clam shell found on the beach or in shallow water. The edges are sharp enough to severely cut one’s foot causing him such pain he pisses himself.
Joe: Hey Kyle, why is Glen jumping up and down holding his foot.

Kyle: Ya and it looks like he pissed in his new wet suit.

Joe: Oh F@@@!!, he must have stepped on a piss clam.
by Blk Ngt December 17, 2010
A funny name for longneck clams, which live under the sand and squirt up water when you step near them.
I want to join up with Jim and walk up and down the beach, and step on piss clams.
by j-lingo August 30, 2010
a slang term for a sea urchin, as quoted by "Sol Rosenberg" (Jerky Boys).
i was calling because i don't want to be tied up to motor boats anymore and dragged like a fool.. i wanna join with Jim, and walk up and down the beach, and step on piss clams.
by deven the white dude September 12, 2010
A womens snatch viewed horizontally while urinating; as it resembles that of a Gooey Duct Clam.
"Jessica shut the bathroom door, I don't need to see your piss clam!"
by Urban Fireman September 12, 2008
The accumulation of urine and toilet paper chards left over and trapped in a the pubic hair of females. Especially notable when performing oral sex on a female.
I went down on this chic from the club last night and she had some serious pissclams!

Can I get a side of pissclams with that?
by gooty2 January 22, 2010
a clam that grows on your unmentionables after someone urinates upon them
hey you, sal rosenburg, you got get some pissclams now ya hear!
by ThisSiteIsRetarded July 30, 2003
Vagina ,pussy, cunt, snatch, well.....you know
That's quite the piss clam you have there!
by kingofbeef June 16, 2011

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