Top Definition
Knife poop (nye-ph)(p-oo-p )- n derived from English slang - a turd that splits your butt hole because it has to stretch so far causing excruciating pain due to the interior walls of your anus being ripped i.e jagged poop.
Omg my anus is bleeding! It must have been a knife poop!
by kat_aklysm July 20, 2011

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