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.
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
Get the mush citymug. 
by Mushbird.shagger June 29, 2021
Get the Portsmouth’s Biggest Mush Birdmug. i love you mush
by ilrbslm2 November 28, 2022
Get the mushmug. A dingy mush is someone who displays signs of stupidity and lack of common sense, typically said from people in Bradford
by Jrphil June 29, 2023
Get the dingy mushmug. The big silly dosser that works at Rascals that forgets too book days off for seshes the fuckin prune
by Benrobbo77 October 12, 2021
Get the mushmug.