When you fart and the stench can instantly clear out a room. The smell is like that of a rotting corpse plus a few burritos. The disgusting smell will take an extermination crew plus a few weeks to clear out.
Doug: "Man, I took a shit and now I have the worst post-shitile farts!"
John: "Dude! Those are more than post-shitile farts! Those are Big Jo Inglefarts!"