a family friendly term for WTF/WTH, usually used when something surprising or strange happens. Is also used in the same context as most "what the..." phrases.
Man 1: *pulls out a bag of dead cockroaches* guys. look at this!
Man 2: WHAT THE QUAN?!
Man 3: what the quan is 'what the quan'?
by antant August 22, 2009
Used for when something unexpected or stupid happens, used like what the hell.
by TomahawkTy July 11, 2008
similar to wtf. orignally used in the beginning of a sean kingston song.
guy: dude look at that girls getup

other guy: what the quan?
by lkaj;lkdja;lkdjl;ad May 22, 2009