cunt-a-loon Share definition Flag A person with poor hygiene, lacking intelligence, and in general a real jack ass. They are not liked by any one and are highly obnoxious. What a cunt-a-loonDude that guy behind you is a cunt-a-loon cunt-a-loon by M Clay March 28, 2011 0 0 Get merch Get the cunt-a-loon mug. Buy Now — $32.95 See more merch