prison slang for items owned by an inmate that may be legal to buy, but were constructed or obtained through illegal means, hence they are contraband
See that stinger there he's usin' to warm up his coffee? The end's ripped off. It's a mush fake and it's a fire hazard. Tell him to get rid of it and buy a new one at the store.
by peerath January 25, 2006

The result occuring a day or so after smoking spice (such as K2) in which you experience slight memory loss and feel rather stupid for the whole day. Experts believe this is just a mental paranoia experience that can lead you to think you have something wrong with your brain.
Johnny- Fuck, I forgot about that homework, dude!
Tom- Probably cause of that K2 you smoked the other day.
Johnny- I think my brain is messed up dude!
Tom- You have massive Mush-Brain!
Johnny- Fuck Mush-Brain.
Tom- Probably cause of that K2 you smoked the other day.
Johnny- I think my brain is messed up dude!
Tom- You have massive Mush-Brain!
Johnny- Fuck Mush-Brain.
by UndercoverStoner February 21, 2011

by G-pa May 25, 2009

The new word for apple sauce. For real its not a sauce! I don't see you putting it on anything. Just call it apple mush!
Dude #1 "Hey dude want some apple sauce?"
Dude #2 "Its called apple mush! Get your head in the game!"
Dude #2 "Its called apple mush! Get your head in the game!"
by Theapplemusher April 30, 2010

When two flaccid guys lie on top of each other penis to penis. The penises are therefore, "mushing."
by The Base April 11, 2016

by Boston_Larry June 27, 2013

by Dutch girl 69 August 29, 2019
