Field of flatus

The fragrant force field resulting from someone passing gas. Usually the flatulator (or flatulatrix, if it was a lady) will have already fled the scene. If you arrive immediately after the offense occurred, you might bounce off the invisible dome of stench (you are essentially being repelled by the force field of flatus). Sometimes, it’s hard to know where the borders of the flatus field are, and in these cases it is safe to assume that some time passed between the original offense and your arrival on scene. Most fields of flatus will dissipate within 5 minutes. Some of the most notable ones have been rumoured to last well over an hour...however, no one has actually stuck around long enough to verify this.