a fart that starts off as a small,
deliberate fart, but then you suddenly realize that it isn't safe to fart
at the moment, so you hold the rest of the fart as long as you can. When it's safe to fart, the fart will be about as loud as a fully-loaded
whoopie cushion fart.
Jonny was at work, and farted at his desk when nobody was around. Before he finished the fart, his boss
walked in to check on
everyone. By the time the boss left, Jonny released his Dormant Fart, and
everybody in the surrounding offices heard it. Including the boss.