They, dressed to the nines in showy outlandish garb and flashy jewellery, took part in the New Year's float parade.
The restaurant was all chandeliers, white tablecloths and silver. And the yuppy waiters all dressed to the nines, looking as though they were about to perform in a stage show.
You might say when I wear my best clothes, I am dressed to the nines or dressed to the teeth.
dressed to the nines.