slunkmeat
It has no real definition, but it's derogatory and can describe a skank or someone that your friend has already fucked, sloppy seconds.
Greg: Hey Tom, how are you? I was thinking, I sure wouldn't mind if you fucked my ex-girlfriend Vicki.
Tom: No way! Do you think that I would fuck that piece of slunkmeat?
Tom: No way! Do you think that I would fuck that piece of slunkmeat?
Slunkmeat
A large, usually unattractive saggy breasts.
"Damn did you see Mary's boobs??! Girl got a whole lotta slunkmeat"