A verb used to describe the timber and all other auditory characteristics of a really muddy, undefined and characterless piece of audio - wheather be it the sound produced by a musical instrument, the sound of a certain piece of audio gear like a speaker or a microphone, recorded material or otherwise.
Concert attendee #1: Wow this band is so loud, yet I can barely understand what the frontman's screaming.
Concert attendee #2: Yeah the guitar sound is so fuzzy, it all just sounds like mush city.

Kid A: These headphones are crap, every time I turn the volume up it goes straight to mush city.

Dude A: Hey man have you listened to my new track?
Dude B: Yeah it's nice man, but you totally overdid it with the reverbs. Sounded like mush city to me.
by Tresspasserxmassacare June 30, 2017
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