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To pinky swear, or make a pinky promise, is the entwinement of the little fingers "(pinkies)" of two people to signify that a promise has been made. It is often seen in anime, where it is called a yubikiri (指切り Japanese for "Finger Cut-off" ).
In the United States, the pinky swear has existed since at least 1860, when Bartlett's Dictionary of Americanisms listed the following rhyme accompanying the promise:
In Japan, the pinky swear originally indicated that the person who breaks the promise must cut off their pinky finger.[dubious ] In modern times, pinky swearing is a more informal way of sealing a promise. It is most common among school-age children and close friends. The pinky swear signifies a promise that cannot be broken or counteracted by the crossing of fingers or other such trickery.