Meaning handbrake in English, there is no apparent reason for it to be called an emergency handbrake; as there isn’t often a emergency situation where it would be a good idea to lock up the back wheels. Smarter Americans call it a parking brake.

A term used to reference cannabis/marijuana/weed.

You idiot, It's called a hand brake it the UK, and 'smarter americans'? what a joke! who's stupider that americans? apart from donkeys?. No-one! that's right, you're the idiot.

When you're banging a chick from behind and she grabs your dick and yanks it up to her ass, similar to how one would engage a traditional parking brake on a car.