O.S. Bar

The handle bar that is on either side above a seat in a car, that is used when the driver makes too sharp of a sharp movement with the car, such as a sharp turn, and the passenger or passengers usually say, "Oh Shit!" and grabs onto that bar. Hence "O.S.".

Driver: "Grab onto your O.S. Bar!"

Passenger: "What?"

Driver makes a sharp turn

Passenger: "OH SHIT!"

Driver: "Told ya."

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