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Very, very big, as in big squared.
Etymology: A mix between huge and humongous.
The Hummer H2 is a hugemongous car
by GameboyRMH December 12, 2004
Used to describe something really fucking big.
Godzilla is hugemongous
by bbbigbossbb November 23, 2005

Larger than humongous

That ice cream sundae is hugemongous!
by solid gold easy action January 04, 2003
To describe the size of my dick.Which is huge.
My dick is Hugemongous
by Nicktothescrip April 30, 2009