knob chopper 

precariously balenced toilet seat which falls down while having a piss and therfore must be held up manualy

knob chopper by Joe Rodgers (cotk) May 8, 2003

knob chopper 

A person who is ignorant and generally has no idea about anything.

He is a complete knob chopper

knob chopper by Nodrama September 27, 2006

Knob chopper 

Someone who bites off a mans penis

Holy shit Sarah is a knob chopper, she bit David’s dick off

Knob chopper by Biggest boi420 October 26, 2018

knobchopper 

a toilet seat that really annoyingly wont stay up when you are urinating, you can try to use on ehand to hold it but this can be messy, otherwise it will fall on you

person: i was in the toilet but it was a frickin knobchopper
friend:ouch

knobchopper by daibheaid October 16, 2005

Knobchomper

One who likes to put dick(s) in their mouth. May or may not chomp, or bite down on said dicks.

Guy 1: "Dude, why's your dick all cut up?"
Guy 2: "Oh that's Mandy, she's a Knobchomper."
Guy 1: "Damn, dude that sucks."
Guy 2: "Naw bro, it bites."

Knobchomper by Leeshagnarl February 17, 2015