someone who kisses so bad, that it feels like a piece of clam in your mouth instead of someone's tongue
Person1: "I hooked up with that girl Kellie last night."
Person2: "How was it?"
Person1: "Awful, she's a clam."
Person2: "How was it?"
Person1: "Awful, she's a clam."
by chiefcrazyhoe May 05, 2003