A small burst of gas occurring from the butt, made of the fumes emitted by fecal matter. If one is quiet, it is very smelly. If it's loud, it doesn't smell too bad.
Yo, do u smell that?
Yeah, sorry I farted.
Bro, thats weird. Dont do that, but not gonna lie yours smells pretty nice.
Thanks I put rose perfume on my buthole yesterday.
Cool!