- Used as a greeting or to attract someone's attention.
- Used to express emphasis: Today's my birthday, yo.
- (colloquial) shortened form of your
- Yo sandwich only has bacon in it. Want some ketchup on that?
- (Baltimore) third-person singular, familiar
- Yo was tuckin' in his shirt! (Stotko and Troyer 2007)
From you're, your, etc.