Any of several flightless sea birds, of order Sphenisciformes, found in the Southern Hemisphere, marked by their usual upright stance, walking on short legs, and (generally) their stark black and white plumage.

An auk (sometimes especially a great auk), a bird of the Northern Hemisphere.

A nun (association through appearance, because of the black and white habit).

A tropical American plant (Bromelia pinguin) that has plum-shaped edible fruit and yields fiber.