(noun)the female equivalent of a Cock-Block; a person who interferes with a woman's chance of getting laid, lucky, or boned; generally the "ugly friend" or "previously rejected."
(verb) to block a female from getting sex.
also Clam-Jammy (adj) describing a person with nookie blocking qualities, who may pose a threat to other men-seeking women.
"Jane, you are a bitter Clam-Jam! That guy was incredibly hot, and now he's gone!"
"That Clam-Jam may be five-foot-ten, but I have the Kama Sutra memorized and he'll never know."
"I am going to Clam-Jam Samantha, because that nasty wench spilled my drink and flirted with my boyfriend."
"There is a very Clam-Jammy cougar leaning at the bar, and I'd like to cut off her stilettos with a nail file."
To smoke marijuana in an enclosed vehicle, causing the vehicle to fill up with smoke. This achieves a better high because no smoke is wasted in the process, and is usually done with a blunt or a joint. This is known as clam baking.
"Me and George are going to clam bake in his car later, want to come?"
"We clam baked last night and we were trippin' balls after words."
"George clam baked in his car and now can't get the pot smell out of it."
"Hey, want to go clam baking later?"