Decorated with decorative braided fastenings called frogs, as on a military uniform or formal coat.
From 'frog,' a decorative fastening button, possibly from Portuguese 'froco' (clasp), used since the 18th century in military uniform terminology.
Military and formal uniforms use 'frogs'—braided loops—and no one's entirely sure why they're called that, but it might reference their hopping appearance when done up decoratively!
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