Polar bear
An older bear whose beard and body hair have turned white or silver: big, hairy and burly, with a coat that has seen a few winters.

A polar bear is an older bear whose beard and body hair have gone white or silver. Same big frame, same belly, same hug that lifts you off the floor, just with a coat that has seen a few winters. He is usually in his fifties, sixties or beyond, and the word is said with real affection.
It is not just "old bear". The white fur is the point: a polar bear is a bear who has turned the color of snow, and many men find that exactly as sexy as it sounds. A gray-bearded man who is slim rather than burly is more of a silver fox; a polar bear needs the bulk.
Where it comes from
Polar bear is one branch of the bear family tree. Bear itself, for a hairy, beefy gay man, is in print by 1979, and as bear culture grew it sorted its members by age, size and build: the young cub, the slim otter, the gym-built muscle bear and, at the top of the age ladder, the white-haired polar bear. The joke is obvious once you see it, and that is why it stuck. We have not found a reliable first date for the term, so we leave it at that.
Polar bear, daddy, silver fox
A polar bear is often also a daddy, since age and a protective vibe come with the package, but the words do different jobs. Daddy is about age and attitude, whatever the body. Silver fox is about gray hair and good looks, usually on a slimmer, well-groomed man. Polar bear is about the body: big, hairy and white.
How it is used today
As a self-label on bear apps and profiles, and as a type. Older men are often treated as invisible in gay spaces, and the bear world is one of the places that pushes back: there, gray fur is a selling point, and polar bears have their own fans, often younger cubs and chasers who say it straight out in their bios.
Not every white-bearded bear uses the word. Some find it cute, some find it a reminder of their age. Ask before you call your date one.
Related terms
Sources 1
- Green, Jonathon. "bear, n." sense 6c. Green's Dictionary of Slang, online edition. https://greensdictofslang.com/entry/uxduejy