spongebob baylypants
When a skinny, snobby, entitled chick wears butt & form-fitting pants, but her butt, waist and lower back are all the same width, giving not the appearance of an hourglass figure and a shapely rump, but rather the appearance of a square box from the middle of her back to the top of her hamstrings.
Dude, how's that date go the other night? Well, she wore Spongebob Baylypants and her ass looked like ole square pants himself, and when she took them off at the end of the night, it was not much better, but I did make that square box butt jiggle from her back to the top of her legs when I did the deed!