Freddie Mercury, the lead singer of Queen, is a rock god.
A rock god is an artist that is so talented and amazing that he is worshipped as a god by his fans. A rock god has ususally touched the masses beyond just his music. An artist that people can associate with an idea/style/time.
Kurt Cobain, Ozzy Osborne, Judas Priest, Tupac, Jonnathan Davis, hell even Elvis are all rock gods.
A bad ass rock climber that others worship. All other climbers pail in comparison to a rock god.
Chris sharma is a rock god, and so dreamy.
Adam Ondra is a rock god, but so weird looking.
Tyler Willcutt is a rock god, the son of the south.