2. Hey or hi.
3. Used as a replacement for words such as dude, man, bro.
4. Used to express interest or show agreement/acknowledgement.
5. Yelled to get someone's attention. Like 'Oi'.
It's yo' bong next.
2. Yo', what's up.
3. What's up yo'.
4. Dude 1 : Yo', that is sum fine-ass booty.
Dude 2 : Yo'.
5. Yo', over here man.
The term "yo" actually came from the word: "anneyeonghaseyo". "Anneyeonghaseyo" is korean for hello, in a formal matter. Note the last 2 letters, yo. Neti's got sick of such a long-ass greeting, and moved on to a more shorter greeting: "yo". Because koreans are either so cool (male) or so cute (female), their slang was passed on to the people of today.