: a small tool that consists of a handle attached to a piece of carved rubber and that is dipped in ink and then pressed on paper to print a date, name, symbol, etc.
: a person or organization that automatically approves everything that someone does or decides
Full Definition of RUBBER STAMP
: a stamp of rubber for making imprints
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>
a: a stereotyped copy or expression <the usual rubber stamps of criticism — H. L. Mencken>