Stage Fart 

A fart that will not come out when you are ready to let it go

I was holding in some big ones at work. When I went to the bathroom, I had stage fart.

Stage Fart by seanbmoredudeyeahbuddy March 5, 2009

stale farts 

a fart that doesn't leave it's position, meaning it stays in its original x and y fart coordinates and has unmatched smell strength properties compared to regular farts.

(farts in room)
(10 minutes later)
yo dis smell aint goin away bro, u got sum stale farts up in this bitch

stale farts by pseudoderp June 13, 2014