beer money
From Longman Dictionary of Contemporary Englishbeer moneyˈbeer ˌmoney noun [uncountable] British English informal a little extra money to buy a drink or have fun with The job was never going to make me rich, but it kept me in beer money for a while.Examples from the Corpusbeer money• The lads would say they were out of beer money, so I'd go looking for a booth.