dressed to the nines

Adjective

idiomatic not-comparable

(idiomatic) Very fancily or formally dressed; wearing very showy or splendid clothing.

Japanese Meaning

（慣用句）極めて豪華で派手な、または非常に洗練された服装をしていることを示す表現。 / とてもお洒落で目立つ装いをしているさまを表す。

She arrived at the gala dressed to the nines, turning heads as she entered.

彼女はガラにとても華やかに着飾って到着し、入場するや否や注目を集めた。

Sense（1）

(idiomatic) Very fancily or formally dressed; wearing very showy or splendid clothing.

He arrived at the gala, dressed to the nines in his top hat and tails.