Birakunisineh
A nasty smell that lurks in the air that has high notes of ass that has not been washed in a week. The word originates from the Iranian word for ass - 'kun'.
Girl: Damn that smells bad, what the hell is it?
Boy: I've got a cold, what does it smell like?
Girl: Birakunisineh
Boy: I've got a cold, what does it smell like?
Girl: Birakunisineh