Top Definition
My own type of fail. Pronounced "Mumumumumonster FAIL Fail fail" (fading).
Guy 1: What are those scissors for?!

Guy 2: Your face!

10 minutes later
Guy1: Haha LOL! that makes sense!

Guy2: You just now realized that? *Laughs* Mumumumumonster FAIL Fail fail
by av3nger November 13, 2010
1 more definition
when someone fails extremely hard (see fail) this word can be used.
it is derived of the PC game Unreal Tournament, where a massive amount of consecutive killing led to a "Monsterkill!".
Dude 1: Damn, I got ditched by this chick yesterday even though I was SO sure she loved me!
Dude 2: M-M-M-MONSTERFAIL!
by I wish i was a pretty girl September 27, 2006

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