in (one's) glad rags

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in (one's) glad rags

Dressed in one's fanciest clothes. This isn't a formal event, so there's no need to be in your glad rags. A group of teenagers in their glad rags boarded the bus on their way to the prom.
See also: glad, rag

in your glad rags

in your smartest clothes; in formal evening dress. informal
1922 H. B. Hermon-Hodge Up Against It In Nigeria We all turned out in our glad rags to join in the procession.
See also: glad, rag