An expression of laughter or 'giggles' when something funny and/or mischievous occurs. Most often when acting in a manner that is not prohibited or frowned upon. Can be used for both sexes, a unisex word.
Example One
Girl: Oh mi gawd, I really should not be getting fingered on my parents bed.

Guy: Hehenincompoopyshizz!
by Jamandewinrizock May 12, 2009
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