The handle in a car on the passenger's side on the ceiling above the door. It's called the JC Strap because that's what you yell when you have to use it.

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.

"Jesus Christ" Strap. Handle found in most automobiles above the door windows and employed when the driver opts for some crazy cornering or drives over a cliff. So named as passengers will often scream "JESUS CHRIST" when this phenomenon occurrs.