Blow-off valve

In a car that is equipped with some sort of forced induction system ,such as a turbo or a supercharger, a blow-off valve is usually availible as an aftermarket part to release excess pressure (boost) from the turbine system. Makes a very distinct noise. Like - pssssshhhhhhhhh! Or somtimes a chirping noise depending on the blow-off valve. Usually replaces a stock part usually refered to as a by-pass valve.

1. Gil: Whoah, dude! Did you hear that car go by?
Willy: Yeah, it sounded like it had a blow-off valve.

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Car girl Blow Off Valve

The act of fucking a car thot and while she climax’s pulling out so she lets out a couple of loud, wet, queef’s

car thot: I really need a good guy in my life.
Thot destroyer: well maybe if every guy standing here hadn’t given you the Car girl Blow Off Valve you could find one