mutual admiration society

Noun

 * 1)  A group of two or more people, in a workplace or other social environment, who routinely express considerable esteem and support for one another, sometimes to the point of exaggeration or pretense.
 * Those two are incessantly flattering one another. They've formed an utterly nauseating mutual admiration society!

Usage notes

 * Matt Dubey's lyrics for the 1956 Broadway musical Happy Hunting, became an instant hit and brought the term into common use:
 * We belong to a mutual admiration society.

Translations

 * Czech: my hoši co spolu mluvíme,, kamarádíčkové
 * Polish:, grupa wzajemnej adoracji, klub wzajemnej adoracji, kółko wzajemnej adoracji
 * Russian: о́бщество взаимного восхищения
 * Swedish: klubb för inbördes beundran