To shit in a pillowcase repeatedly for about a week or until said pillowcase is adequately filled with poo. Once complete, a "Stacy" (a very tired or already asleep person) must be located. After the target is acquired, you must lift the "Stacy's" head and replace their normal pillow with the shit-filled equivalent. Once they are nose deep in the new pillow, you slap them as hard as you can across the face and yell out "Don't be such a lazy Stacy".

An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.