noun "Sunday best" describes the clothes some wear to church on Sunday. They're referred to as "best" because they're supposed to be your nice / dressy clothes.
Father wears his Sunday best
Mother's tired she needs a rest
The kids are playing up downstairs
Sister's sighing in her sleep...
Brother's got a date to keep
He can't hang around...
by rich rick February 27, 2012
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the best sex on sunday morning

after a long ass weekend of fucking partying.
chick: what we doing sunday

me: im giving you the sunday best to finished it.
by fts.bts October 20, 2015
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The best band on long island.

Maybe even the world in like 2 years

Im not kidding.
Steve Tedesco you like sunday best right?
by ST9 April 13, 2009
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A style of dress popularized in Delaware County Pennsylvania. Scholars have long argued over the precise date of the creation of the Delco Tuxedo, but most maintain that it originated on Sunday, January 27th, 2002 at the St. Laurence 8:30 am mass. With the Philadelphia Eagles playing in their first NFC championship game since 1981, thousands of Delco's sons piled into alters throughout the county, in hopes that keeping holy the Sabbath would propel the Eagles to a victory. Since the Eagles were playing an away game, mass attendance rates were significantly higher than was normal. Congregations throughout the county were noted as being "smellier, greener, and scummier than normal" by then Cardinal, Anthony Bevilacqua.

Auxiliary Bishop Joseph McFadden, who presided over the 9:30 AM mass at Holy Cross in Springfield noted: "Never in my life have I seen so many Brian Dawkins jerseys atop gray Dan Algeo Cardinal O'Hara Football Hoodies and loose fitting denim jeans. And while not every member of the congregation was wearing a Dawkins jersey, every adult male had Timberland Boots adorning his feet."
Algeo might wear a COHS hoodie and headset on Friday night, a Penn State Football KKK whiteout suit on Saturday afternoon, but on Sunday, he puts on his his delco sunday best and honors the Eagles with Timbs, jeans, a hoodie, beer, and of course the jersey of whatever defensive player takes the most cheap shots during the course of the game.
by boss hamilton January 24, 2011
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