Gluttonous describes behaviour — or a person — marked by greed, especially excessive eating and drinking. A gluttonous appetite devours far more than the body needs; a gluttonous feast piles indulgence upon indulgence. The adjective inherits the moral colouring of gluttony, one of the traditional seven deadly sins, implying not just large consumption but a disorderly, self-indulgent relationship with food and drink. Writers deploy it for vivid criticism of banquets, buffets, and binge culture. In modern nutrition discourse the word is largely replaced by clinical terms — overeating, binge eating, hyperphagia — which describe the behaviour without the sermon. Still, “gluttonous” remains unmatched for sheer descriptive relish.