in full fig
Dressed in fancy or extravagant clothing and accessories. All of a sudden, a group of actors from the musical boarded the train in full fig and began leading the passengers in a rousing rendition of the show's biggest numbers. For her wedding, the bride was dressed like a Disney princess in full fig.
in full fig
wearing the smart clothes appropriate for an event or occasion. informal Fig in the sense of ‘dress or equipment’ is now used only in this phrase, which was first recorded in the mid 19th century.