mutt

Noun

mutt (plural mutts)

1. A mongrel dog (or sometimes cat); an animal of mixed breed or uncertain origin.
   • Mr. Beerbelly, Beerbelly / Get these mutts away from me / You know, I don't find this stuff amusing anymore1986, Paul Simon, “You Can Call Me Al”, in Graceland

   Synonyms:

   Heinz 57

2. (derogatory, humorous, usually) A person of mixed racial or ethnic ancestry.
   • Soon, we will no longer be an outpost of Europe, but a nation of mutts, a nation with hundreds of fluid ethnicities from around the world, intermarrying and intermingling. Americans of European descent are already a minority among 5-year-olds. […] Immigration reform or not, the nation of mutts is...2013 June 28, David Brooks, “A Nation of Mutts”, in The New York Times, →ISSN, archived from the original on 12 Nov 2020
3. (Internet, broadly, derogatory) A person from the United States.
   • Kys degenerate cumbrain. Satisfying fetishes that seem mean is one thing, but you should always respect your own people, no matter how "shit" or "retarded" they are. Not that I'd expect a demoralized amerifat to understand. You probably fuck different races or other mutts anyway so the love for...2019 December 11, anonymous author, 4chan, /bant/
4. (US, derogatory, slang) An idiot, a stupid person.
   • “I knew you weren’t such a mutt as you looked,” she cried.1923, Agatha Christie, The Murder on the Links
   • I must say I think Chloe was a bit of a mutt to walk on the bed and then leave a button somewhere about. She might have learned better than that from the pictures surely.1927, Ernest Bramah [pseudonym; Ernest Brammah Smith], Max Carrados Mysteries

   Synonyms:

   addle-brain, addlehead, addle pate, airhead, baboon, beanbrain, beetlebrain, beetlehead, berk, bimbo

5. (derogatory, slang) An ugly woman.
   • Too bad the guys' ^([sic]) wife is a total mutt. I guess he wants to achieve a less stressful life; he married ugly.2007, Lewis Korn, Ice Cold, page 49
6. (slang, Antarctica) The snowy sheathbill.