Definition of 404
404 
adjective
- missing or misplaced.
My car keys are 404.
by Eric B., Fort Worth, TX, USA, Aug 10 1998.
noun
- an unintelligent person; MORON, DIMWIT.
I wouldn't ask him, he's a 404.
by Walt W., Natick, Massachusetts, USA, Jun 17 2003.
- a worthless person, place, or thing.
Don't go to that bar - it's a 404.
by Robbie G., Stroud, Hampshire, UK, Feb 13 2006.
verb
- to not know or temporarily forget; DRAW A BLANK.
I'm 404ing on that.
by The Jargon File, Aug 04 2009.
origin
- 404 is the web code for "web page not found."
by Anonymous, Jul 17 2007.
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