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1 definition by Big Jez

KSI

KSI (Kissing Sphincters Indiscriminately) are a community of anilingus enthusiasts on XBox Live.

John: Dude, why does the mic on this headset smell like ass?
Jeff: Oh, I joined KSI the other week and they made me sell my toothbrush.

by Big Jez October 18, 2013

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