A genre of music that was a watered down version of punk rock. Due to radio and MTV this is what was pushed in the early 1990's to be the music of a new generation. It is characterised mostly by its lack of talent and whiny lyrics. The fashion that it inspired basically turned all kids in the 90's into Shaggy from Scooby Doo. Mid length dirty hair and flannel, at least it was easy. In the words of Andrew Dice Clay's character Ford Fairlane, "You're raping rock and killing roll!". That about sums it up. A few words to describe Grunge would be repetitve, somber, whiny, unmusical, lame, sad, boring and garbage. The main culprit in the Grunge Movement, aka Bowel Movement, would be Nirvana.
Grunge music is helpful if you need inspiration to puke something up. Grunge, the next elevator music. I just dropped some grunge in the toilet.