Green’s Dictionary of Slang

dressed up (flashily).

1606		T. Baker Hampstead Heath I i: A mighty Reputation for her to sit dish’d out like a fruit Stall, and ogle a young Fellow, that he may take her out to dance.
		1749 Satan’s Harvest Home 10: [D]ish’d out out like a Bride in the most delicious Manner, with Lace, Essence, and Ribbons.