noun

1. Dirt or grime; any vague or unknown substance

   “I washed all the gunk off the light fixture, and found that it was white, not brown.”

2. A subculture of 21st century American males, combining elements of modern gothic culture with punk rock.

3. A member of the gunk subculture.

Synonyms: goo, goop, grime, gunge, muck

verb

1. To soil or make dirty