An extremely ugly person. This term is used when you are too lazy to say "extremely ugly person", so, alas, uggo was created.
A: My dog is frightened of me..
B: That's 'cause you're an uggo.
A: Your Mom!
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n. uh-goh, uh-gohs

One who is ugly; offensive to the eye; repulsive
I hate uggos.
by Bubbler July 23, 2003
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A Word Used To Describe Really Really Ugle People Often Used Describing A Person Beyond Just Ugly
OMG What An Uggo!
by Diablo February 21, 2003
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the ugliest girl of a group of girls, often times with a group of popular girls
that group of girls is pretty hot, besides the uggo
by Will-is-God January 17, 2005
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1. an ugly person whom once you catch the sight of their repulsiveness, you just want to blow chunks everywhere.

2. an ugly hoe.
1. dude, ive never seen someone so scarily hideous!

thats because theyre an uggo!

2. dude, i saw that uggo crawling out of your bedroom last night. how much you pay?

i know what im getting you for your birthday... a room full of fat uggos!
by guardian_pretender June 09, 2009
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It is said that an uggo is just a green elf who lives in the irish woods, some of them like to play instruments like guitars and drums and hang out with other elves, naked most of the time. They really enjoy sexual activity and videogames.

NOT FRIENDLY, quite aggreessive
" I found an Uggo eating mushrooms the other day "
by shon January 01, 2004
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A word that a homo named Rio made up because he's a retard.
That guy's an uggo... and I'm 1337 Sauce, RAWR.
by Steve Mitchell July 31, 2004
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