When, after releasing a cloud of farticles, you suddenly get up from your chair and walk across the room or office, trailing a cloud of farticulate matter behind you and contaminating the vicinity.
Dude! I heard that! Take your farticle accelerator somewhere else! (waves hands to dissipate farticle cloud)
Friends who take the blame for a fart they clearly did not let out.
George was out with his girlfriend at a friends bar and was having a good a time until he farted loudly. Before he could take ownership, his friend proudly exclaimed, "It was I who let out that loud fart!" Bill was a true Farticus that day.