Someone who is not only mean, but also a maniac. Someone who acts totally crazy while being their everyday mean self. Usually accompanied by their crazy laughter that is so annoying.
Breezy was a total meaniac when I took her Chuck T's away.

"Don't flick boogers at me you meaniac!"

by Lynda Loo Foss November 07, 2007
One who exhibits seemingly uncontrolled angry tirades or behaviors
Alice is such a meaniac whenever she's thwarted in any way.
by bitterminnesota November 18, 2009

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