{n. phr.}, {informal} Best clothes or outfit of clothing. * /The cowboy got all dressed up in his best bib and tucker to go to the dance./ * /Mary went to the party in her Sunday best and made a hit with the boys./ Compare: GLAD RAGS.
SUNDAY GO-TO-MEETING CLOTHES
Meaning of SUNDAY GO-TO-MEETING CLOTHES in English
Dictionary of English idioms . Словарь английских идиом. 2012