The act of ripping a stanky fart next to another person then immediately running around them tight circles so as to create an inescapable cyclone of noxious fart gas.
Dude I just got fartnado'd pretty bad, every direction was full of stink.
Being 100% confident with yourself that you need to fart, so you push as hard as you can to do the best fart possible. But instead of farting, you shoot shit at a fastspeed directly into ones underwear.
When two or more people around someone fart around the same time causing the stink from their farts to meet at that person and making a super cloud of stink like when the cold and warm fronts of a tornado meet.