That I feel when we out mashin'
Me and my girlfriend

from 2Pac – Me and My Girlfriend Lyrics on Rap Genius

Meaning

Like the rest of the song, mashing has 2 meaning, one for a girl and one for a gun.
“Mashing” could mean “making love”, but you can see how pulling a trigger also has a certain mashiness to it. They both end with a bang or shot
Mashing can mean “hitting the gas, mashing the pedal. Means 2Pac was living fast.
Or mashing your fucking face in.
Mashing your brain like potato’s.

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