mutt

noun6

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 anymore — 1986
2. •
   (offensive, humorous) A person of mixed racial or ethnic ancestry.
3. •
   (slang, offensive) An idiot, a stupid person.

   • “I knew you weren’t such a mutt as you looked,” she cried. — 1923
4. •
   (Internet, offensive) A person from the United States.
5. •
   (slang, offensive) 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
6. •
   (slang) The snowy sheathbill.