knife fag 

A person who regularly brings a knife or other cutting tool to their school/workplace in a vain attempt to look cool. They will frequently play with the knife and use it on every inanimate object in sight.
See also lighter fag

Robert you are a knife fag. Put your Gerber away, you don't impress anyone.

knife fag by I got no pants April 20, 2003

knife fag 

Someone who constantly looks for an excuse to use their knife to accomplish trivial tasks that could easily be solved using you bare hands/teeth.

Dave: "Oh sweet a pack of skittles!"

*Pulls out knife from belt clip*

Joe: "Dude, you realize that doesn't require a knife, right?"

Dave: "Yea but then I won't look like a badass."

Joe: " You, my friend, are a knife fag."

knife fag by RaGeQuaKe September 11, 2011

knife fag 

A person who plays Modern Warfare 2 and runs around stabbing everyone with a knife

I would enjoy playing online much more if is wasn't for those knife fag's

knife fag by vatonyjmu1978 February 4, 2010