go as

go as (someone or something)

To attend a party or other social gathering in costume or dressed up to resemble someone or something. I'm going as Marilyn Monroe—how about you? A: "We should go as fairies!" B: "Yes! I already have a pair of sparkly wings from an old Halloween costume."
See also: go
Farlex Dictionary of Idioms.

go as someone or something

to pretend to be someone or a type of person. There's a costume party this weekend. I'm going as Santa Claus. My husband and I are going as a king and queen.
See also: go
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • go as (someone or something)
  • go to (something) as (someone or something)
  • look like
  • look like (someone or something)
  • trick or treat
  • emerge from (something) as (something)
  • after the fashion of
  • after the fashion of (someone or something)
  • after the fashion of somebody/something
  • dressed to kill
References in classic literature
"I think it was so splendid in Father to go as chaplain when he was too old to be drafted, and not strong enough for a soldier," said Meg warmly.
"Don't I wish I could go as a drummer, a vivan--what's its name?
Little Women