To drive away quickly.

To Peel out and drive away.
by Shando January 28, 2004
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to paint graffiti, to go out on the town.
Yo we are going to mash out all weekend.
by xylena June 23, 2006
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To get knocked down or knocked out to get overpowered layed out or rolled over
That guy got mashed out in front of the store he must of stole something
by Gil Geor March 22, 2018
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