Green’s Dictionary of Slang

1. (W.I. Rasta) outstanding dreadlocks.

1990		R. Mulvaney Rastafari and Reggae 33: Gorgon. Rasta name for someone with massive dreadlocks.
[2003		S.M. Craig Maidens of Babylon 43: My hair, which l usually wore in long dreadlocks, had grown a foot longer, [...] like Medusa, the famous Gorgon of Greek legend].

2. (W.I., also gorgan) a thug, a ruffian; thus as a term of address.

1995		Francis-Jackson Official Dancehall Dict. 22: Gorgan a toughie; roughneck: u. de man is a gorgan.
2004		W.E. Jackson Flight from Babylon 212: Nah get red-eye, gorgon. Retrieve it inna mornin’.