When you are walking down a road approaching a very hot chick and want to know if her ass is as hot as her face. As soon as you walk past her you turn a full 180 degrees in order to creep on her ass.
Dude 1: Did you see how hot that chick was?
Dude 2: Yeah man, as soon as I got past her I stuck a perfect backside creep 180 to get a look.
Dude 1: And...?
Dude 2: The view was sensational!