Words and phrases unique to a group of people or region

1. Y'all (Southern United States)

2. Eh? (Canadian)
3. Jawn (Philadelphia)
4. Ciao (Italian)
5. Pop (Midwest United States)
6. Mate (Australian)
7. Oof (Internet slang)
8. Irie (Jamaican)
9. Cheeky (British)
10. Gnarly (California surfer)