Do you mean PHAT? or FAT?.........
Think of the kind of criticisms Mrs. Osamabama would make of a black man romantically involved with a white woman ~ she'd note instantly that the white woman did not have an Africanesque figure ~ and she'd say "not too fat for black".
I've heard this one, but it's even made A1 in the Washington Post, and the lead in their Sunday commentary section.