Function: noun
Date: 1881
1 : a stamp of rubber for making imprints
2 a : a person who echoes or imitates others b : a mostly powerless yet officially recognized body or person that approves or endorses programs and policies initiated usually by a single specified source <the parliament was a rubber stamp for the dictator>
3 a : a stereotyped copy or expression <the usual rubber stamps of criticism ― H. L. Mencken> b : a routine endorsement or approval
– rubber-stamp adjective