Wiktionary
lifts a finger
vb. (en-third-person singularlift a finger)
Usage examples of "lifts a finger".
No one lifts a finger to stop this mad woman with her golf club as she hotfoots it down the aisle toward the vestibule.
Nobody lifts a finger to pull you out when you are drowning, unless there is something in it for him.
My fur coat hangs from the back of the trap, but I cannot reach it, and not one of my agile pack of patients lifts a finger.
Jack lifts a finger like a professor about to make a point or a bandleader about to deliver the downbeat.
My fur coat is hanging from the back of the gig, but I cannot reach it, and none of my limber pack of patients lifts a finger.