get/pull your finger out

pull (one's) finger out

To cease stalling or procrastinating and do something soon or at once. Primarily heard in UK, Ireland. I've had my learner's permit for nearly two years—I need to pull my finger out and get my driver's licence already! I wish Mary would pull her finger out about choosing the florist she wants for the wedding.
See also: finger, out, pull
Farlex Dictionary of Idioms.

pull your finger out

or

get your finger out

BRITISH, INFORMAL
If you tell someone to pull their finger out or get their finger out, you are telling them rudely to start working harder or to start dealing with something. If Bexley Council had any sense they would pull their finger out and shut this place down. I have told them to get their fingers out and start winning games.
See also: finger, out, pull
Collins COBUILD Idioms Dictionary, 3rd ed.

get (or pull) your finger out

cease prevaricating and start to act. British informal
See also: finger, get, out
Farlex Partner Idioms Dictionary

get/pull your ˈfinger out

(British English, informal) used to tell somebody to start doing some work or making an effort: I wish the police would get their finger out and solve the crime! If you pull your finger out, we might finish on time.
See also: finger, get, out, pull
Farlex Partner Idioms Dictionary
See also:
  • pull (one's) finger out
  • pull your finger out
  • and be done with it
  • get (one's) finger out
  • get your finger out
  • piddler
  • have done
  • have done with
  • have done with (someone or something)
  • be/have done with somebody/something