Definition of grebo in English:

grebo

noun

British
informal
  • A youth favouring heavy metal or punk rock music, and having long hair.

    • ‘But basically kids are really keen to label each other, they even told me I was a grebo because I like the Kaiser Chiefs.’
    • ‘It was the birthplace of the unlamented, long-haired ‘grebo ‘scene of the late 80s, whose bands sported long hair and baggy shorts onstage.’

Origin

1980s: perhaps from greaser, on the pattern of words such as dumbo.

Pronunciation:

grebo

/ˈɡriːbəʊ/