do a somebody

do a (someone)

To act as someone else has or usually does. Sally did a Mom and hit the trash cans while backing out of the driveway. Don't do a me and sign the contract before you read it—I'm still paying for that mistake.
Farlex Dictionary of Idioms.

do a somebody

(informal) do or behave as somebody did or would do: Now don’t go and do a Mr. Carpenter on us. He told us he was leaving only three weeks before he went, and it took us months to find a replacement.
See also: somebody
Farlex Partner Idioms Dictionary
See also:
  • do a
  • do a (someone)
  • yenta
  • a lot, not much, etc. in the way of something
  • in the way of
  • in the way of (someone or something)
  • roll around
  • get the point
  • get in the way
  • get someone's goat, to