From Longman Dictionary of Contemporary Englishpinkiepink‧ie, pinky /ˈpɪŋki/ noun [countable] especially American EnglishHBH your smallest finger SYN little finger
Examples from the Corpus
pinkie• Suddenly a huge, hairy, knuckled hand bearing a diamond pinkie ring and a fiver appeared between me and my sewing.• He pole fished pinkies at eight metres for a dozen small roach to 5 oz.• Which she held stiff-fingered with her pinkie up.• Around the locks, such as Mansell, a few small fish taken in clearer water to bread punch or pinkie.• He wore a small, perfect-sized pinkie ring on his left hand.Origin pinkie (1800-1900) Probably from Dutch pinkje, from pink “little finger” 