calling somone a silverback gorilla is a complement..
when a gorilla's fur turns silver its due to a chemical/hormonal reaction when it becomes the leader of the pack..
silverback gorillas are the biggest on the mountain and is one of the fiercest predators in the animal kingdom...
any human would lose a fight to a silverback...
actually Silverbacks would be a great team name for an NFL franchise...
Davie Silverbacks, i like it