A retaining ring sometimes called a spring clip, cerclip, c-clip or e-clip. Used to retain pins, gears, bearings, and other mechanical devices. Often referred to as a Jesus clip, because they inevitably fly over your shoulder leading to the exclamation "Jesus, where did it go?"
Be careful with that Jesus clip, when it goes flying, only God knows where it comes back down.
by BigATB November 30, 2018
A spring clip that holds a pin in place.
Hand me that jesus clip.
<sound of clip flying to the other end of the garage>
Jesus! Where did it go?
by buggum September 19, 2005