Etymology
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grungy (adj.)

"sloppy, shabby," 1965, American English slang, perhaps based on, or blended from, grubby and dingy.

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grunge (n.)

"sloppiness, dirtiness," also "untidy person," 1965, American English teen slang, probably a back-formation from grungy. In reference to the music and fashion style that originated in Seattle is attested from 1989.

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