1 definition by Blk Ngt
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.
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