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A female who is horribly unattractive and likely very stupid. Ugmars are often confused with warpigs or swamp donkeys.
Graham: Hey I heard Eli hooked up with some chick at the bar last night.

Matt: Yeah, but she was a total ugmar.

Graham: Worst news walruses.

Dude, that girl has a massive gunt. What an ugmar!
by Monsier LeC June 13, 2011
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