The most simple, yet complex language, with an estimated 1,400,000,000 speakers worldwide. The language is used via one word - honk, with meaning derived from context. A loud honk at a green light typically expresses anger at a driver for not going fast enough, while a soft honk at a pedestrian is usually a polite request to walk faster.
An absolute amazing instrument in a car. A very simple yet useful instrument which is BUILT to allow you to warn other drivers of danger, but really is 90% of the time used to tell another driver that they're an asshole.
A WARN Honk is usually two or three short taps on the horn, followed by holding the horn down if it doesn't get the attention of the driver.
A "you're a dick" honk is usually held down for about 1-3 seconds to clearly inform someone that they've pissed you off.
A "GO!" Honk for someone sitting at a green light is usually 2 short taps on the horn.
I honk my car horn when some jackass decides to cheat traffic and cut into my lane from a turn only lane. They deserve to be honked at because they need to be told that they're not special and they're an asshole for cutting the line when the rest of us wait.