Pinky Finger, Pinky, Little Toe, Pinky Toe
Noun
こゆび
なんでグラスで飲み物を飲む時に小指を立てるの？
Why do you extend your pinky when you drink from a glass?
いってぇー、そこのタンスの角に右足の小指ぶつけた。
Ouch! I just hit my right pinky toe on the corner of the dresser.
またシュートミスっちまったぜ。突き指してる小指のせいで今日はまじでダメだわ。
That’s another air ball. I’m doing badly today because of this jammed pinky finger.
The small finger is your little finger or pinky finger. Makes sense, but it's also used for the pinky on your feet. You know, your pinky toe.
This word uses the kun'yomi readings from both kanji, probably because it includes body parts. You know them both already, so now you know this too!