your Sunday best

(one's) Sunday best

One's very best clothes, as one would wear to a Sunday church service. Instead of some big party, let's all get dressed up in our Sunday best and go for lunch at a fancy restaurant for my birthday! This is going to be a formal event, so please come dressed in your Sunday best. You can't wear jeans to a place like that! You need to be decked out in your Sunday best.

See also: best, Sunday

Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

your Sunday ˈbest

(informal, humorous) your best clothes: She got all dressed up in her Sunday best to meet her boyfriend’s parents.

See also: best, Sunday

Farlex Partner Idioms Dictionary © Farlex 2017