Someone is ON a fashion plate.

It means this person dresses in the latest trends or are at least interested in following them up.
by Yara S Korayem June 12, 2008
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to dress in styllsh clothes; to look successful, to look well dressed.
Joe's a nice guy, but he's no fashion plate. Just wears jeans, white socks--you know the type.
by JG 1 May 3, 2022
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