frost grizzly Share definition Flag A large arctic carnivore, scientifically recognized as Ursus maritimus, that less-poetic people often call a polar bear. The frost grizzly is the only known enemy of saber-toothed seals. frost grizzly by Smilodactyl222 February 11, 2015 0 0 Get merch Get the frost grizzly mug. Buy Now — $32.95 See more merch