grunge /ɡrʌndʒ/ BrE AmE noun [uncountable]
[ Date: 1900-2000 ; Origin: grungy ]
1 . a style of fashion and music popular with young people in the 1990s, involving loud electric music and dirty clothes, hair etc:
grunge rock
2 . American English informal unpleasant dirt:
What’s all that grunge in the bathtub?
—grungy adjective :
a pair of grungy trainers