When some lazy bastard wants to clean his shower but is only reminded of the task every time he gets in to use it so he squirts shampoo all over the floor of the shower and kicks it around until the bubbles stop and he calls it clean. His logic being: Hey it works on hair right?
Guy 1: Dude! The shower looks great! Did you finally break down and clean it?
Guy 2: Nah, I just gave it the old "shower shampoo".