in full fig

in full fig

Dressed from head to toe 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.
See also: fig, full

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.
See also: fig, full
References in classic literature ?
The Gardens are a tremendous big place, with millions and hundreds of trees, and first you come to the Figs, but you scorn to loiter there, for the Figs is the resort of superior little persons, who are forbidden to mix with the commonalty, and is so named, according to legend, because they dress in full fig.