Top Definition
A jackass who has the added advantage of being a maniac.
example 1:
J-Dev:" That guy is driving like a stupid Jackmaniac!!"
example 2:
Sruti" Who is submitting so many words to the UD"
J-Dev:" Its some random Jackmaniac!"
by J-Dev September 25, 2011
a person hugely obsessed with Hugh Jackman
Sam: Daniel's mum is a right milf

Toby: I wouldn't go near her, she's a jackmaniac
by whatamisupposedtowritehere August 21, 2013
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