That twat everyone wanted to murder in school due to his/her massively inflated ego, self-obsessiveness and downright sadism. Generally the bully, and often has repressed issues of their own, they are driven insane by the voices in their head telling them to be a conformist, and so drive everyone around them insane by doing the same thing, and yet ironically promotes himself/herself under the nebulous moniker of a "rebel". Murderer of self-worth, dignity, individualism and everything a modern society professes to stand for, yet promoted in the media and society in general as a great role model. Generally fails in life due to thinking they were too "cool" to get a job, or a house, or a source of income, and more often than not forced by terrible circumstances to work for the very nerds they were bullying. Listens to mediocre and downright bad pop music, and, assuming the pop to stand for popular, not populist, he/she forces his/her (lack of) taste onto other people. An all-round arrogant, sadistic tosser that should never have been let out of the asylum.

When a someone under 18 is as cool as a cucumber and wears snazzy sunglasses

Selome. Wherever Selome is at, that's where the cool kids are at.

The kid/kids that everyone meets in high school that have nothing better to do than flex in the mirror, fake their depression, very badly lip sync songs, play rust, get tattoos in some Asian countries, vape, cheat on their girlfriend (multiple times), flirt with everything that moves or breaths (Girls only) and most importantly look like lesbians

Cool kids aka shi**y cool kids is a group of kids that consume alcohol and or vape. They think there cool but there actually a group of fags.

There are three requirements to become a cool kid:

1) Drinking
2) Drugs
3) Casual sex

Any one of these acts are classified as cool, but to become a certified cool kid you must have taken part in all 3 activities.

True cool kids excel in all 3.

A kid too 'Cool' to do what everyone else wants to do or do anything at all. This will include ditching his/her friends to do nothing at all or not do homework.

His Almighty Coolness