Noun : refers to people who listen to a range of music from punk to metal. It was once common to see greebos wearing blue jeans black hoodies and to have a metal chain hanging from their pocket however this seemed to disappear after the ascent of the chav as many greebos descended into chavdom. Greebo was once used as an insult by chavs and those with little understanding of the side darker of life however over time the insult has faded and it has just become accepted by people such as myself as a way of describing us. Greebo is somewhere between skater and goth.
chav: you fuckin' greebo
chav; *hangs head in shame*