mutt

/mʌt/
noun
  1. A dog of mixed or uncertain breed; a mongrel.
    • They adopted a friendly mutt from the animal shelter.
    • The mutt wagged its tail happily as the children played nearby.
    • Our mutt is a mix of several breeds, but we love him anyway.
  2. An insulting term for a person, meaning someone who is stupid or incompetent.
    • Don't be such a mutt — read the instructions first.
    • He called me a mutt after I made a silly mistake.
    • That mutt forgot his keys again and locked himself out.
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What does "mutt" mean? | whatsthatwordmean | whatsthatwordmean