Silverback

[Greta]

A term used to describe the larger [buck] or bigger undomesticated black male. Usually a [parolee] because his larger size from regular meals and lifting [weights].

[Couch Potatoe]

A mature male mountain gorilla, distinguished by an area of white or silvery hair across the back and acting as the dominant member of its social group.

[Tanya Shivari]

an older male gorilla (= a large ape) that has white or silver hair on its back and is the dominant (= controlling) member of its group: