Following a particularly heinous gastral discharge, the essence of fart that clings to a person and follows them as they move, usually good for a range of anywhere between 5-50 feet.
Tom excused himself to go rip a huge cloud of methane from his ass in another room, but he didn't wait long enough for the fart to dissipate. He came back to his desk dragging a nasty fart trail behind him that made the rest of us nauseous.
The process of tightning your but cheeks and letting loose continous little farts while walking usally more than 3 to 5 steps for fear of ripping one ginormous fart
Oscar: holy crap dude...
Oscar: I totaly farted a huge trail back there. It mustve been that entire hall way!!
Jason: is that what that tapping sound was?!!? Man that mustve been a huge fart trail, that tapping was going on for a good minute and a half!!!!!
Oscar: YEAH!! LOL!!!
Hot chick in the hall way: OMFG!! Whats that smell!!!
Oscar: dude! Lets gtfo of here!!!