The person(s) on the set of an adult film whose sole purpose is to clean up any stray male ejaculate (i.e. jizz) that happens to have hit the floor or furniture
My friend's dad was the jizz mopper for The Hedgehog's last film.
the jizz moppers job is to clean it up after each guy shoots a load, cause practically everyone does it right on the glass. I dont know if youve noticed but cum stains if you dont clean it up right away