fartaneous
Describing an occurrence of two people farting simultaneously.
After their dinner of rice and beans, Pat and Jean passed gas fartaneously, much to their surprise and amusement.
fartane rating
A number associated with the richness of flatulence. A number 2 rating is average and might be mistaken for "forgetting to take the garbage out" A number 4 rating will typically clear out a medium sized room while a number 8 is a serious combustion and explosion hazard.
Arthur, at any party could always be counted on to rip one with a number 4 fartane rating. People who knew him well would always reply with a blessed be the fruit right before they made their exit.