The phrase "in best bib and tucker" dates back to the early 18th century and refers to dressing formally or elegantly. However, there are several other colorful ways to describe dressing up. One could say they are "dressed to the nines," "decked out," "spiffed up," or "looking sharp." Other synonyms include "dressed to impress," "suited and booted," "all dolled up," "prepped and polished," and "putting on the Ritz." No matter what phrase you choose to use, the intent is clear: to present oneself in a classy and sophisticated manner.