nah son
A loud and dramatic way of saying no that involves eye rolls, hand flaps, and a tone that suggests you’ve seen worse.
Nah son, I ain’t going to that party. You think I wanna be the last one there? No way.
Nah son, I’m not doing your homework. You’re on your own, kid.
Nah son, I’m not eating that. That’s not food, that’s a crime.