Pinkie (noun)

1. The little finger.
2. The fifth digit of the hand, which is the one next to the ring finger.

Origin:

Alteration of pink, from the practice of cutting off the little finger as a penalty for theft or as proof of having taken an oath of loyalty; akin to old english pynce little finger, latin digitus finger, digit-, from digere to point.

Examples:

1. She broke her pinkie finger playing soccer.
2. He held the glass with his pinkie extended.
3. She used her pinkie to press the button.
4. He used his pinkie to play the piano.
5. She held the spoon with her pinkie extended.