Rhinoceros

/raɪˈnɒs.ər.əs/

Synonyms

  • horned mammal
  • rhino
  • ungulate

Slang Meanings

A person who is big and strong.
Don’t mess with him, he’s a real rhinoceros!
Someone who is very stubborn or tough to deal with.
My boss is such a rhinoceros; he won't change his mind easily.