adjective/ʁɔ.kɔ.ko/
rococo (architectural style, all senses); Relating to old traditions, which may be seen as foolishly outdated; archaic, old-fashioned, obsolete, backwards
Undoubtedly, a word from rocaille and barroco, to denote pejoratively a "rock" style, then gone out-of-fashion; invented in 1797 by Pierre-Maurice Quays, pupil of Jacques-Louis David and firebrand of an austere neoclassical style.