Lift-a-finger definitions

Used other than as an idiom: see lift,‎ finger.
verb
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(idiomatic) To make minimal effort; to help as little as possible.
verb
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Origin of lift-a-finger

Compare 1769, Oxford Standard text, King James Bible, Matthew, xxiii, 4 — For they bind heavy burdens and grievous to be borne, and lay them on men's shoulders; but they themselves will not move them with one of their fingers.