your best bib and tucker
(one's) best bib and tucker
One's dressiest or most formal attire. A "bib" and a "tucker" are now-outdated clothing embellishments. Be sure to wear your best bib and tucker to the gala tonight.
your best bib and tuckerOLD-FASHIONED
If you are wearing your best bib and tucker, you are wearing very smart, formal clothes. The conference guests all turned up on time in their best bib and tucker. Note: In the past, a `bib' was the part of an apron which covered the chest. A `tucker' was a decorative part of a woman's dress, covering her neck and shoulders.
your best bib and tuckeryour best clothes. informal
Bib and tucker originally referred to certain items of women's clothing. A bib is a garment worn over the upper front part of the body (e.g. the bib of an apron), and a tucker was a decorative piece of lace formerly worn on a woman's bodice.
your best bib and ˈtucker(humorous) your best clothes that you only wear on special occasions: Bill put on his best bib and tucker and booked a table at a top restaurant for a romantic dinner.
Bib and tucker are both items of clothing worn in the past.