pinky swear

n.

An eternally binding act of hooking pinky fingers together in an attempt to seal the deal of a promise that has been made.

The pinky swear originally indicated that the person who breaks the promise must cut off their pinky finger.

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.

Also known as pinky promise.

thimble

n.

A small metal cap worn for protection on the finger that pushes the needle in sewing.

wedding ring

n.

A ring, often one of a pair of plain gold or platinum bands, given during the wedding ceremony by the groom or bride to his or her future spouse.

It is usually worn on the base of the left ring finger – the fourth finger (counting from the thumb) of the left hand.

Also called wedding band.

pen spinning

n.

A recreational activity of using one's fingers to manipulate a pen in aesthetically pleasing ways.

This is done through the combination of various tricks.