1 definition by RunawayPanda

An object placed upon a hard chair ( i.e. a stool ) in the form of a cushion or a similar device, used to soften the area that is sat upon. Commonly used when a person will remain stationary for extended periods of time, such as when one is gaming.
"Dude, my ass is falling asleep. Hand me a stool softener."
by RunawayPanda January 20, 2014
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