Knife masturbation is obviously - masturbating with a knife. A form of knifeplay which involves fucking yourself with a knife, could be several different places. I prefer my asshole. The hard part is sticking the tip inside. Or if there is rigid ends it becomes more difficult. Some may enjoy poking themselves with knives but youll never truly live until the blade is up your ass.
by Giant ballsack Tumor May 13, 2016
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Verb: To rubber knife. Closely related to whiskey dick. Attempting sexual intercourse with a semi-flacid, half stock erection.
"I got fall down drunk last night on Gin and rubber knifed my best friends fiance". "My girlfriend is pissed at me cause I rubber knifed her last night"
by Jeremy Maddox January 9, 2008
Get the rubber knife mug.When Janice accidentally stepped on his new, camel-suede designer loafers, Brad behaved like a total butter knife.
by TARZANSGAL June 28, 2017
Get the Butter Knife mug.by .NuKeZ January 13, 2005
Get the knifed mug.a poo knife....a tool used to cut a pice of poo too large to fit round the u-bend of the toilet. often a kitchen kinfe..not too sharp!
by tayzor111 October 10, 2006
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