Keep your finger crossed = to hope for good luck
To slip through someone`s fingers = to be able to scape from someone
Can count on something on the finger of one hand = to say something is rare, does not happen a lot.
To have green fingers = to be very talented with plants.
Fingers were made before forks = proverb used to justify eating with your finger rather than using forks.
To have sticky fingers = to have a tendency to steal.
To have a finger in too many pies = to be doing too many things at the same time.
To put your finger on something = to know exactly why a situation is the way it is.
To lay a finger on somebody = to touch or harm someone.