Green’s Dictionary of Slang

a British youth cult featuring a cultivatedly sordid appearance, a boorish manner and devotion to heavy metal music.

1996		A. Close Official and Doubtful 53: Most of us were Grebos, or Skins or Suedes.
2001		OnLine Dict. of Playground Sl. 🌐 greb, grebo, greebo n. dirty, greasy haired, pos. dressed in dishevelled clothes, rocker-type person, pronounced gree-b.
2006		D. Mitchell Black Swan Green 80: I took them from that grebo in the pub.