This is a portrait of Abbath, singer and then bass-player in the Norwegian black metal band Immortal.
Immortal is not the best black metal band ever, but I love their fantasy imagery, as well as the resemblance between Abbath and Gene Simmons (hence the tongue out).
Bass is my favourite rock instrument, so he was pictured with his bass.
His belt buckle is meant to look like Motorhead's Snaggletooth.