About a Girl by Nirvana.
The word “grunge” is American slang for “someone or something that is repugnant” and also for “dirt”.[12][13] The word was first recorded as being applied to Seattle musicians in July 1987 when Bruce Pavitt described Green River‘s Dry as a Bone EP in a Sub Pop record company catalogue as “gritty vocals, roaring Marshall amps, ultra-loose GRUNGE that destroyed the morals of a generation”.[14] Although the word “grunge” has been used to describe bands since the 1960s, this was the first association of grunge with the grinding, sludgy sound of Seattle.[15][16] It is expensive and time consuming to get a recording to sound clean, so for those northwestern bands just starting out it was cheaper for them to leave the sound dirty and just turn up their volume.[15] This dirty sound, due to low budgets, unfamiliarity with recording, and a lack of professionalism may be the origin of the term “grunge”.[17]
https://en.wikipedia.org/wiki/Grunge
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