silver fox

Short definition from Wiktionary

Noun

1. 1
   A melanistic red fox (Vulpes vulpes) with silver to black fur.
2. 2
   A domestic rabbit of a rare breed with silvery-black fur.
3. 3
   An attractive person who has graying hair.
4. 4
   An attractive person who has graying hair: An attractive man with graying hair.
5. 5
   An attractive person who has graying hair: An attractive woman with graying hair.