The passenger grab rail on a sportbike. Or, can also be a passenger holding strap, located at the front of the sportbike's "bitch seat". Refered to as the "Oh Shit" Bar, because that's the last thing your passenger will ever say, if they lose their grip on it.
"Amy ended up in intensive care, when she lost hold of the "Oh Shit" Bar, while Rico was rounding a curb."
by D. Gould October 09, 2006