Nah ah ah
A fancy, stupid way to say 'No way.' It's like you're in a band and you're trying to be extra.
My brother said 'Nah ah ah' when I said I was going to beat him at chess.
My friend said 'Nah ah ah' when I told her I ate all the pizza.
My crush said 'Nah ah ah' when I asked him to go to the movies.