"Boo Gee," more commonly spelled "Bougie," is a slang term that describes someone who is perceived as aspiring to a higher social class than they actually belong to.
According to the reference material, bougie can be used as a noun or an adjective:
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Noun: Someone who's considered middle class yet wants to be upper class and is determined to live a wealthier, flashier, more lavish lifestyle (designer labels).
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Adjective: high-class, fancy, materialistic, snobby.
In essence, a "bougie" person aims for an opulent lifestyle, often associated with designer brands and high-end experiences, even if their financial status doesn't fully support it. The term carries a connotation of pretentiousness or striving to appear wealthier than one is.