Haaann - A sound that means you’re either very surprised or very dumb

A sound that means you’re either very surprised or very dumb. It’s like a mix of What and I can’t believe this.

Haaann? You’re gonna fail again? Are you even trying?

Haaann? You just said I’m a ‘cool person’? I’m confused.

Haaann? You’re gonna eat that whole pizza? Are you trying to get fat?