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An abbreviation of the phrase 'Ugly Mutt'. Used in reference to a person who resembles a dog.
Person1: 'You macked her? She's an ugmutt!'
Person2: 'She is not'
Person1: 'DUDE, she has a god damn moustache'
Person2: 'True dat'
by Choctommy101 January 24, 2010
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