I ain't on nat - You're refusing to be a part of the dumb stuff. You're like

You're refusing to be a part of the dumb stuff. You're like the kid who’s too cool to get involved.

I ain't on nat, I'm too cool for this nonsense.

I ain't on nat, I'm just here to see what happens.

I ain't on nat, I'm chilling like I'm in a commercial.