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1 definition by cMacthat

Knifey- a form of shartplug. Wherein you mold a piece of toilet paper into a sliver or "knife" and tuck it gently between your butt cheeks.
I ate a lot of chilli so I made myself a knifey and went to the movies feeling confident that no one would even know I was sharting.
by cMacthat October 23, 2011