Definition from Wiktionary, the free dictionary
hoss (plural hosses)
- (US, slang, South) A horse.
- (US, slang, Southeast) A big person, usually a man; a person who has size comparable to that of a horse.
- (US, slang, Southeast) Slang term of address for a man. What's up, hoss?
- (slang) A well-respected person.
- (US, slang, Northwest) A Car.