When a
woman is taking it from behind from a male(usually a law enforcement officer but can be a male of any profession) in an aggressive fashion and the male's
penis unexpectedly and forcibly enters the back
door(anus/butthole) with out warning.
Girl 1: "Why are you walking funny?"
Girl 2: I met this cop at the bar last night. He started fucking my from behind and next
thing I
know he executed a No
Knock Warrant. I've been walking funny ever since."