Fashionable or stylish in an affected or excessively trendy way; or something pretentiously fashionable.
From French 'chic' (stylish) with doubling for emphasis, possibly influenced by Spanish 'chichón' or Italian expressions. It became popular in English in the 1920s to describe overly decorated or ostentatious things.
The word perfectly captures how the ultra-fashionable can tip into ridiculousness—it's the difference between elegantly stylish and trying-way-too-hard chic.
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