(n.) or (adj.)
A term generally used to describe modern-day teenagers, typically girls between the ages of 14-18, who like create a "hardcore" persona on Tumblr by reblogging pictures of inverted crosses, dip-dyed hair, ying-yang symbols and toilets. They like to pretend that they listen to grunge music by wearing stylish Nirvana tees that match their $200 pair of Doc Martens. If you were ask them who the Misfits were, they'd probably say anyone who isn't sporting spikes this season.
Noun: That purple haired girl over smoking a cigarette in the rain is sooo soft grunge.
Adjective: Check out this soft grunge blog for pictures of girls that look like zombies, cats, and zombie cats!