The terms big cat and great cat, while not a biological classification, are used informally to distinguish the larger felid species from smaller ones. A narrower definition of it includes five members of the genus Panthera: the tiger, lion, jaguar, leopard, and snow leopard. Only members of this genus are able to roar. A more expansive definition additionally includes the cougar, clouded leopard and cheetah. Especially the clouded leopard is considered an evolutionary link between big and small cats.

is a fictional character in Sega's Sonic the Hedgehog series of video games. He first appeared in the 1998 Dreamcast game Sonic Adventure, where he was placed to justify the presence of a fishing rod in the game, although he was conceived beforehand. Big is a large, blue anthropomorphic cat, who is depicted as—while unintelligent—sweet, easygoing, and physically strong.