British informal adjective describing someone or something that is self-consciously affected, pretentious, or putting on airs — the social crime of trying too hard to seem sophisticated. A posey person might live in a painfully trendy flat, drop obscure cultural references into every conversation, or affect mannerisms borrowed from people they want to impress. Close in meaning to 'poncy' or 'posh,' but with an extra layer of performative effort baked in.
Everyone found the new bar a bit too posey for a Tuesday night — all exposed brick and craft cocktails with unpronounceable names.
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(British, informal) Pretentious; posturing.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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