It's the "International Fart Glossars" (Feel free to add new definitions)
"Old Faithful" - Mostly a smelly one. Stays with his creator for a long time. It occurs when you enter a restaurant/meeting/church/party/etc. You deflate outside, enter the location and right in the moment when you greet the most important person/most beautiful woman in the group, it's right there to do its job.
"Between the Sheets" - Mostly harmless if you are alone, great fun if you can share it with someone. Develops its full potential under the cover and is released by a "random" move. Watch that it exits towards other person. Under all circumstances hold back enjoyment until released.
"The Getaway" - It just simply slips out. You don't feel it coming, you don't have to, all of a sudden it's there. No smell, no extreme noise, just a little, mean "pfffrrrt". Occurs when you bend down, kneel down, carry heavy, sneeze (double audio pleasure), blow your nose (mean sucker, because YOU don't here or feel it yourself). If it happens to you, just act normally as if nothing has happened.
"Pathfinder" - Sits in the tubes just waiting for some room to move (Or in football-terms: He is looking for daylight). Happens when you burp, pee or deliver some clay at the porcelane throne.
"Double trouble" - Extreme noise and violent smell, but would kill you if holded back. High pressure, no chance of interrupting. Most of the time happens in public, e.g. public toilets (more volume) or at somebody elses bathroom during dinner, so that when you come back the women can't look at you and the guys laugh.
"Pretender" - Comes in two flavours "Sound" or "Smell". You feel it coming. You are in public. You give it a test shot to monitor its behaviour (sound or smell). It is perfectly ok. You open all valves and he shows his real face. Big trouble.