Much like a regular "handle" of liquor, a Jesus-handle is any quantity greater than 1.75 L of top-tier liquor. It is a colloquial for people who avoid the Godless metric system, and believe that sermons are best preached from atop a bar-stool.
The handle above the windows in most cars, so called for the propensity of people to shout "Oh Jesus!" while clutching it in mortal terror at the driver's skill level or sanity.
The Family Friendly version of the O SHIT GRIP, HOLY SHIT GRIP, O SHIT HANDLE. During certain driving conditions involving specific drivers, the word "Jesus" is typically screamed by the passenger(s) in the vehicle. They are also custom handle wraps available for any vehicle.
Term for the handle above the pasengers head on a car that can be used for hanging coats, but more often grabbed at times when your firend is driving whaaaay to fast.