ass aura 

A strange scent/warm feeling that arises out of one's ass and/or chair that appears when said person has been sitting in said chair for a prolonged period. Mostly caused by a combination of a hot day, a poorly ventilated seat/pants, and a naturally sweaty ass.

Bob refused to sit down for the meeting, for he did not want to stink up the room with embarrassing ass aura.

ass aura by Koizumi Shinichiro May 9, 2007