charity shop
From Longman Dictionary of Contemporary Englishcharity shopˈcharity shop noun [countable] British EnglishSHOP/STORE a shop that sells used goods that are given to it, in order to collect money for a charity SYN thrift shopExamples from the Corpuscharity shop• When family charity fails to clothe you, try a charity shop.• Members of the town's hospice movement say trade has fallen dramatically at their charity shop.