To commence farting as you start walking down a hallway or passage - trying to make the fart last all the way to the end. Ensures a consistent unpleasant experience for any followers
Man! - I just followed the longest fart train ever - its was awful!
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...
Jason: what?
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!!!
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.