Verb. The act of opening your ass cheeks and letting one loose producing a quiet to silent fart. Not to be confused with open hole gas
by definedefinition March 10, 2014

A release of a fart outdoors that is so dense and vile that not even a breeze, strong wind, or any other weather related condition can safely disperse the heinous ass gas before it makes its way to all surrounding victims’ noses. Even moments later, this thick and gaseous hell-beast of a rectal belch will stay lingering in the same outdoor vicinity in which it was spawned.
The family cookout was going well this past weekend, until Bobbo laid an open air fart that cleared the entire picnic area and almost killed his already unhealthy, jaundice looking friend, Smear.
Minutes later when EMTs arrived to collect Smear, the lingering aroma of Bobbo’s open air fart forced them to wear decontamination suits and oxygen masks in order to enter the hot zone.
Minutes later when EMTs arrived to collect Smear, the lingering aroma of Bobbo’s open air fart forced them to wear decontamination suits and oxygen masks in order to enter the hot zone.
by Mr Damien Bean May 21, 2015

Jimmy let an open throttle fart out while he was next to me at the urinal, it's poor bathroom etiquette.
by chortik October 04, 2011

When your fart opens your anus releasing a wad of air while producing no noise.This fart can either be stinky or have no smell at all. If your stomach hurts than your fart will be hot and smelly.
by steph and holly December 03, 2003

While at the office, casually walk over to a co-worker as if you have important news. When their guard is down, drop trousers, and in one motion, spread your ass-cheeks as far as possible with your hands and bend over releasing pure gasseous matter directly into the unsuspecting victims face. AKA: OBH (open butthole fart)
I couldn't believe it when Josh open-anus farted right in the middle of the office. His ass was right in my face.
by Ahmet K May 30, 2006

A fart of such noise and strength it can just open a bottle of beer to open a cold one with the boys
by Knee-Lover August 11, 2018

When you erect your anus towards the sky and open it with your fingers. Then you fart out and most likely your fart will be sucked back into your poop chute.
by Elwoodthesheep October 26, 2010
