1. A food that has not yet become stale.
2. A food that has somehow become fresh after being stale.
"Dude, I put my bread in the microwave and it totally got unstale."
"Is this muffin unstale? It doesn't feel that soft."
by Unstalanator August 30, 2009
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When you need to run start your car after stalling it.
I had to unstall my car today after stalling it at a intersection.
by no_name_brand March 26, 2018
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