Top definition
larger than humungus or humongous. Something like humongous only so large that something would be Fumungous!

pronounced Fume-ung-us
If you color on the walls you're going to be in fumungus trouble!
by Mirrrrrrrrrrrrrrrranda! August 18, 2008
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Apr 28 Word of the Day
Literally everyone, ever. Including the writer of this definition.
by masokitsune January 17, 2019
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