rubber stamp
noun /ˌrʌbə ˈstæmp/
/ˌrʌbər ˈstæmp/
- enlarge imagea small tool that you hold in your hand and use for printing the date, the name of an organization, etc. on a document
- (disapproving) a person or group that gives approval to the actions or decisions of others without considering them
- Parliament is seen as a rubber stamp for decisions made elsewhere.