To suggust to someone that they shut up and get out of your goddam sight before you kill them for saying stupid things.
usually incorporates shaking of the fist.
Person1: Do you have any eggos?
Person1: Where's my eggo person2: get off my tv *shakesfist*
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).