Harbinger Fart

A fart that usually warns you of an impending desire to take a fat sh*t that will definitely reduce your reputation with your toilet. It usually has a distinct and more powerful odor compared to the usual ones. It is far more potent, higher chance of leaving a lingering stench in the room depending on the size of the room.

Jack: ''Oh f*ck, I feel that I might need to take a sh*t soon.''
Gus: ''What makes you say tha- *smells the air* ew wtf dude?''
Jack: ''Sorry man, I let out a harbinger fart, that's how I know...''