from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Informal A mongrel dog.
  • n. Informal A stupid person; a dolt.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A mongrel dog; a dog of mixed breed or uncertain origin.
  • n. A person of diverse ancestry.
  • n. As a term of abuse: an idiot, a stupid person.

from the GNU version of the Collaborative International Dictionary of English

  • n. An dog that is of inferior quality or of mixed breed.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an inferior dog or one of mixed breed


Short for muttonhead.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From mutton-head (Wiktionary)



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  • At his first news conference after his election as President, Barack Obama, referred to himself as a mutt when asked what kind of dog his daughters were getting:
    With respect to the dog, this is a major issue. We have…we have two criteria that have to be reconciled. One is that Malia is allergic, so it has to be hypo-allergenic. There are a number of breeds that are hypo-allergenic. On the other hand, our preference would be to get a shelter dog. But obviously, a lot of shelter dogs are mutts, like me.

    July 11, 2009