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the act of having as good of a time as you would while eating mashed potatoes
M: this is a really fun party
S: yeah it's really mashin!!
by Glittergirl March 29, 2017
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1.used to describe the act of traveling at excessive speeds in a motor vehicle

2. utilizing a lifted vehicle or 4 wheel drive to traverse over obsticals
man last night i was out in the car phuqqin mashin' like no other.
by Clay VO January 27, 2004
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Mashin is a word used to descibe beating some one up very badly. Or also can be used as insultin someone very badly.
Example = Man I seen you at the club the other night straight mashin on that mutha.
Meaning: I saw you at the club the seriously beating someone up.
by Dazzle June 04, 2006
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