get (one's) finger out
To stop dawdling or procrastinating. Primarily heard in UK. Come on, Tom, pull your finger out and start working on that report already! A: "Did you finish your paper?" B: "Yeah, I finally pulled my finger out and got it done."
get (or pull) your finger out cease prevaricating and start to act. British informal
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.