little finger
noun /ˌlɪtl ˈfɪŋɡə(r)/
  /ˌlɪtl ˈfɪŋɡər/
 Idioms - the smallest finger of the hand synonym pinkyTopics Bodyb2
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Idioms 
twist/wrap/wind somebody around your little finger 
- (informal) to persuade somebody to do anything that you want
- She has always been able to twist her parents around her little finger.
 
 
