Officially, Gucci is an Italian brand of luxury
fashion products, such as handbags and sunglasses. As many ghettoized American blacks have coveted Gucci's products, though, the
word became a
slang description, too. A gucci person is artificial, materialistic, and uppity—fixated on displaying wealth or refinement
via possessions or airs—while a gucci thing is coveted by such a personality. Like calling someone "boujee", calling someone "gucci" was mostly pejorative.
Yet since the 2010s, with vanity increasingly normalized and even esteemed in American culture, both slang words have shifted from connoting belittlement to connoting admiration.