Referenced in The Wedding Singer by Rob. Meant to describe a fine looking woman who has phenomonal attributes, which you would obviously tap. It is a somewhat derogatory term to refer to a woman as a mere piece of meat, which you would easily take all of.
"Hey man did you see that girl Stacy at the frat this weekend?"
"Oh hell yeah, she was Grade A Top ChoiceMeat."
Cleon Salmon: "Who is Guy... Meatdrapes? What kind of name is that?"
Guy: "It's, um, it's Metdrapedes, sir. It's Greek."
Cleon Salmon: "I think you're pronouncing it wrong. This says Meatdrapes."
Guy: "It's actually pronounced Metdrapedes."
Cleon Salmon: "Well, why doesn't it sound like that when I say it? Meatdrapes."