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Some body that is a such a cunt that it becomes looney to try to reason with them in any way shape or form as reality is not part of their world.
I tried to deal with her but after five minutes she went cuntaloon on me

Holy crap did you talk to that cuntaloon?!?!?

by Yrpuler August 03, 2011
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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-loon

Dude that guy behind you is a cunt-a-loon
by M Clay March 11, 2011
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