One of the mysteries of the English language finally explained.
Of, relating to, or designating a restaurant meal at which one may eat an unlimited amount of food (usually from a buffet), typically for a fixed price. Also in extended use: designating a service offering unlimited availability or use, especially for a single fee or at a flat rate.
An all-you-can-eat offer or meal.
1940s; earliest use found in Valley Sunday Star-Monitor-Herald (Brownsville, Texas). From all you can eat (followed by a price), a slogan in restaurant advertisements from all [noun] + you [adjective, noun] + can + eat.
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