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a fart(release of gases from ass) that is unheard but smells mad bad.
oh man, someone let out a silent killer!
by BuG October 21, 2003
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Jun 24 Word of the Day
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.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

by Billy Chickenhole September 15, 2007
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Someone who kills you silently.

A try hard gamer with a high KD

A pussy master AKA Mr steal yo bitch!! XD
Damn did you see silentkiller on a 30 man kill streak !!??

Someone stole my girl guess it was silentkiller.

Yo he has no social life he must be silentkiller XD
by Silentkiller329 June 01, 2018
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