An overused expression or idea, it comes from the French for "to stereotype"
[DOC] [TLE] clich - American Heritage Dictionary Entry: [PAR] A trite or overused expression or idea: "Even while the phrase was ... [French, 
past participle of clicher, to stereotype (imitative of the sound made when the... [DOC] [TLE] Clich | Definition of Clich by Merriam-Webster [PAR] 1 : a trite phrase or expression; also : the idea expressed by it ...