The eponymous Chuck Rock is an overweight, square-jawed caveman characterized by loutish and lewd behaviour perhaps influenced by the lad culture of the 1990s. Chuck has a limited vocabulary (his favourite phrase being "Unga Bunga" and not much else), has a balding head cut into a punk-style mohawk, eats whole dinosaur-steaks raw in one bite, and has a penchant for picking up rocks and throwing them at things, hence his name. Chuck is a guitarist and singer (or shouter) in a rock band along with some other cavemen, his attractive wife Ophelia Rock, and a long-haired dinosaur bass player; and whilst on stage he wears a long wig to hide his balding head.