taking a shit so long that one is unable to flush it down the toilet, thus requiring a butter-knife to cut it into smaller pieces in order to flush properly.
Dude, I've been holding it in all day and just dropped one hell of a butterknifer.
Gary, you really shouldn't be eating a box of granola bars a day, you might clog your toilet with all the butterknifers you probably take.
That butterknifer is over 14 inches long! Damn!
Gary, you really shouldn't be eating a box of granola bars a day, you might clog your toilet with all the butterknifers you probably take.
That butterknifer is over 14 inches long! Damn!
by Rockit July 24, 2008

When your doing your girl doggie style. You pull out and cum on her asshole. Then spread it with your dick from ass to pussy and back up
by Freddyedge7 December 19, 2016

by MONO-I cant spell the rest June 07, 2003

The act of spreading ejaculated semen on a females tits using your cock. Akin to spreading butter on rolls.
by joebobusa22 April 10, 2010

Sneaking up behind someone and rubbing the thumb-side of ones hand in a smooth upward motion between said person's butt crack.
by ALB_B November 05, 2009

A move preformed when jumping into a pool. No specific movement involved, rather flailing of the limbs, and yelling "BUTTERKNIFE!!". Originally created as a subdivision of the manuver The Jack Knife.
by asdubgiaudgfiua December 24, 2005

by Unko June 21, 2006
