Nah yeah - A loud and confusing way of saying yes that sounds like no,

A loud and confusing way of saying yes that sounds like no, and it's usually said by people who have no idea what they're talking about.

Oi yeah nah yeah, I'm gonna be famous, even though I've never been on TV.

Oi yeah nah yeah, I'm gonna be a superhero, even though I can't fly.

Oi yeah nah yeah, I'm gonna be rich, even though I still live with my mom.