adjective grungier, grungiest
1 informal Grimy; dirty.
2 Relating to or denoting a form of rock music characterized by a raucous guitar sound and lazy vocal delivery.
2.1 Relating to the fashion associated with grunge rock, including loose, layered clothing and ripped jeans.
1960s perhaps suggested by grubby and dingy.
While I have no fear of dirt,
(How much can it hurt?),
There’s no need to be grungy.
Just wipe down with a sponge, see!
(Homage to Charles Schultz character Pig-Pen from “Peanuts”)