Short for the Jacobs Engine Brake, a secondary braking system used on large deisel trucks like fire engines. Used with automatic transmissions, usually on trucks that carry a heavy load. The system uses the compression of the engine as resistance to slow the drivetrain. Beneficial because it reduces wear and overheating problems with brakes. Causes the engine to make a great deep sound that can be heard all around.

1) The Invisi-brake is an imaginary device normally used by automobile passengers to stop a vehicle when the driver apparently seems not to be trying.

2) An imaginary invisibrake allows any passenger to avoid (or induce) a panic-stop regardless of the driver's actual intent.

3) invisi-brake, Invisibrake; device allowing any occupant other than the driver to affect stoppage of a vehicle already in motion.

To fuck a good girl who does not like anal. While doing so, you must place her in the doggy-style position and fuck her vaginally until the moment just before reaching climax. Hence, the name, "brake job". After stopping and making her think you have blown your load already, you must then pull out and slam it in her ass. Remember to be quick...and accurate. Most guys only get one chance. but there have been exceptions. Hold on tight and finish fuckig her until you bust your nut right in her anal cavity. Then, and only then, will you join the ranks of the brake job elite.

The passenger brake is the nonexistant brake pedal located on the floor of the passenger (shotgun) side of the front seat of your car.

It is used instinctively by the passenger when the driver is driving insanely too fast, and the car needs to come quickly to a stop, which may not seem very possible at that particular moment.

It is sometimes used in conjunction with the OH SHIT handle by the passenger door.

to brake up with someone means to end a romantic relationship

An act in which you or a group of people take a brake from their daily routine and smoke some marijuana.

Speeding in front of another driver and then immediately applying the brake, causing this driver to have to stop quickly as well - testing the brakes on their car while evening the score. Usually used as a retaliatory measure against a stupid driver who has pissed you off. Works well on hypermilers.
As a side note - Brake testing should under no circumstances be performed while your wife/girlfriend is in the car. They don't appreciate the need for immediate retribution.