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1.
a forceful pressing motion to the forehead, used to show dominance (usually from a man to woman, or woman to woman) and confrontation
On College Hill South Beach,

Brandon says, "Bitch"
Kyle replies, "I just told you not to call me out of my name (mushes Brandon)"
Brandon replies, "I'm not gonna fight you"
Kyle says, "You just got mushed like a bitch!"
by lja1091 May 05, 2009
 
2.
To be high on mushrooms
Gimme some shrooms...so i can get mushed
by mike28 April 06, 2007
 
3.
To be in a state of such stupor that you cannot speak properly due to mass consumptions of alcohol.
Dude did you see Jason last night, he was so freaking mushed he couldn't even talk!

Alex: Damn Jason you look mushed...
Jason: mhhbbmhhmbauh
by Nicolas Sheasgreen May 03, 2008
 
4.
Rubbing your genitals on someone else's asshole
Guy 1: How was your date last night?

Guy 2: It sucked dude, she was a prude.

Guy 1: She didn't let you do anything?

Guy 2: I'm joking dude, I mushed her all night.

Guy 1: Your fuckin' gross dude!
by 1st block June 01, 2010
 
5.
to get that ass beat quickly for doing something DUMB...especially in public.

'mushing' is usually done by the musher grabbing the mushee by the face, & throwing them to the pavement
that dumb cunt over there snatched my blunt out my mouth...so i mushed that ho to the ground.
by dat nigga jules June 02, 2007