look up any word, like ratchet:
 
1.
humorous term for in-car seat warmers
Dude, i'm freezing my balls off in here. Doesn't this car have stool softeners?
by JSMAX October 05, 2010
 
2.
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 19, 2014