The spide. Most people who live in belfast want to move away as soon as possible because of these poorly dressed monsters. All of them deserve to die, literally. If you are passing by a group of them, completely ignore them, and do not look at them in the eyes or twice. Unless of course you are a spide yourself, or you are dressed similar (it's a good idea to wear a nike top over your Metallica T-shirt, and wear jeans as much as possible). However, if a spide who is on his own calls out to you, he will leave you alone at the slightest comeback. But if you ignore him, he will think you are "scared" and he will continue this.
Walk into belfast city centre, look around for 10 seconds, and you'll see a spide.