To press forcefully down on the exelerater of an automobile with the intention to speed away from the po-po, a rival gang, or to whip ones ride into a spin out.
Mash on the gas B. Them fools be gunnin'
by McLean Nolan June 21, 2006
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The process of making tea, esp. the infusion of the leaves/bags in the boiling water. Purists would suggest that you cannot mash instant (freeze dried) tea.
Are ye mashin'? Me tongue's dry as a camel's arse!
by maffoor September 24, 2004
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When a man and a woman have sex without her getting wet but proceeds to have sex anyway.
He mashed my pussy for six minutes and I wasn't even wet! It was awful.
by sadsexdazzleblast June 15, 2011
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to leave out of a place
this party is weak, lets mash
by bitch_im_me November 28, 2004
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to beat somebody the hell up then stomp they face out
yo, im bout to mash this n*gga out if he don't gimme my $50
by Chuck J December 27, 2005
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