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1.
When one caughs up chest phlegm and deposits it on the ground, by way of spitting.

"Mind your step, there's a pavement oyster!"

by Suzanne and Tom Hodgkinson January 07, 2006
14 9
 
2.
Human gonads for culinary use.
When the chimp escaped, Dad's pavement oysters were served to the zoo.
by LepraconMcPot April 12, 2009
6 3
 
3.
sexy,crazy poster on the living end board
pavementoyster is rocking
by Anonymous August 18, 2003
2 5