a common word used to describe someone who fails at life, someone who just dosent understand how to do things correctly, normally a keroon will get angry easily and use weapons such as screwdrivers to make other people as faillike the keroon. Keroons can sometimes be deformed lacking vital things like chins.
Paul: Wow that guy really isnt good at playing that game.
gino: that guy is a "keroon" look at him go