kubbu
Kubbu is an onomatopoeia used by certain people of Valluvanad and Madhya Thiruvithankoor regions in Kerala. Kubbu is someone who makes annoying sounds and gestures to irritate people. Kubbu is also a facial expression or sound ( similar to bruuu) that annoys everyone in the world.
He made a kubbu face while farting.

I didn't buy him a beef steak. He made a kubbu sound.

He got irritated just for looking at his his face. I think he is a kubbu.