A fork of Rural Dictionary
when your eyes become extremely squinty and a little swollen after smoking marijuana, each resembling a tiny clam
Sally gets the worst clam-shell eyes when she smokes, they look so much like little clams !
When you palm a girls wet vagina and lick it.
Nigga 1: bro how was it with that girl last night?
Nigga 2: man it was sight, I gave her the ole clam shell.