(all) dressed up like a Christmas tree

old-fashioned Dressed in a showy, flashy, or excessively fancy manner; overdressed. Look at her swanning about in all her furs and jewelry, dressed up like a Christmas tree. Why are you getting all dressed up like a Christmas tree? We're only going to the movies. I'm all dressed up like a Christmas tree because the CEO was supposed to visit our office today.

See also: Christmas, dress, like, tree, up

See also:

(all) dressed up like a pox doctor's clerk
(all) done up like a pox doctor's clerk
clerk
doctor
be (all) dressed up like a Christmas tree
dressed (up) like a dog's dinner
dressed like a dog's dinner
dressed up like a dog's dinner
dressed to kill/to the nines
dressed to a/the T

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