dressed to the nines

From dressed + to the nines; first recorded in the 1800s.

• "He arrived at the gala, dressed to the nines in his top hat and tails."
• "During the early part of the day he took a stroll in the vicinity of "Fell's Point," dressed to the nines, with his cravat, and pin, and shirt collar neatly folded over."
• "All you will see is a girl you once knew, although she's dressed up to the nines, at sixes and sevens with you."

• dressed to kill
• Sunday best
• to the nines