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Ugmo -noun

An ugly monster. Lisa Simpson once said it.

"some of them are gorgeous, some of them are plain, a few are ugmos"

Or, from The Simpsons:

Lisa: I'm an ugmo.
Homer: Now, that's not true. You're cute as a bug's ear.
Lisa: Fathers have to say that little stuff.
Homer: Dad, am I cute as a bug's ear?
Grandpa: No. You're homely as a mule's butt.
Homer: There. See?
by Thomas D March 10, 2006
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May 8 Word of the Day
1. Slight sins or offenses
2. Petty crimes or small infractions
3. Las Vegas Punk Rock!
Peccadilloes shows rule.
by James Messina August 11, 2006
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a relatively unattractive female considered hideous to even people with virtually no standards.
WILHELM: do you guys think my girlfriend vera is hot?

COLIN: you mean that hideous goblin over there?

CARL: dude, calling her a goblin is flattering, shes a fucking ugmo!
by ronnie_e July 29, 2010
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ugly mother fucker, these are the two words combined to form ugmo.
man that mattew deveraux kid is a fukin ugmo
by raaal April 06, 2005
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A combination of "ugly" and "motherfucker" Proudly thought of by the Newby/Howard family
"Quit being dumb ugmo"
by J. Newby October 20, 2004
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Really ugly loser who keeps staring at you, and is the type you wouldn't touch, much less date.
Who are looking at UGMO?
by kasmisan June 13, 2010
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