dressed (up) to the nines Informal
Meaning: If you are dressed to the nines, or dressed up to the nines, you are wearing very smart clothes for a special occasion.
- Have you seen Harry? He's dressed to the nines and he looks amazing.
- Everyone was dressed up to the nines for the Academy Awards, with the men in tuxedos and the women in evening gowns.
We were all dressed to the nines because we were