glad rags

plural noun

Informal.

1. dressy clothes, especially as worn to a party or other social event.

glad rags

plural noun

1. informal,  best clothes or clothes used on special occasions

Word History and Origins

Origin of glad rags¹

First recorded in 1900–05

Idioms and Phrases

Stylish clothes, as in Let's put on our glad rags and go out on the town. [Slang; late 1800s]