do a

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 —

behave in a manner characteristic of a specified person or thing. informal
2001 Times One reporter even got the brigadier in charge to ‘do a Blair’ and come over all emotional while discussing the cull.
Farlex Partner Idioms Dictionary
See also:
  • do a (someone)
  • do a somebody
  • 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