slang for the flesh on the back of the knee joint. this term usually references women who are so fat that the guy pursuing them cannot easily access her vagina and will instead fuck something easier to find, such as a belly fold, wrinkle, or in this case, the back of the knee.
you remember that big girl I was with last night? I couldnt get the pussy, but she had that BOMB kneeback!!
by Nahmeen November 24, 2007