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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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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 12, 2018
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