all-you-can-drink
/ˌɔːljəkənˈdrɪŋk/ /ˌɔːljuːkənˈdrɪŋk/adjective
Of, relating to, or designating a venue, event, etc., at which one may consume an unlimited number of (usually alcoholic) drinks, typically for a fixed price.
Origin
1960s; earliest use found in Sunday Times (Salisbury, Maryland). From all you can drink (followed by a price), a slogan in advertisements from all noun + you + can + drink.