Top definition
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!
by Rockit December 15, 2005
Get the mug
Get a butterknifer mug for your bunkmate Sarah.