Ja sam kool is a translation of I am cool in Serb. Even though kool isn't even a word in the Serbian language.
It's used by High school kids in Melbourne, Australia.

a large, cheesy grin on a person, similar to the one the Kool-Aid man has in the commercial. A Kool-Aid Smile is usually seen when a person has accomplished a major feat or task, or something extraordinarily good happens to that person.

Someone who was never cool who desperately wanted to be so changed the C in cool cat to Kool Kat and in turn still knows they are not cool but tries so hard

a sarcastic name for the final gathering of a religious sect on which they all commit suicide by drinking poison usually mixed with some kind of water-soluble fruit drink (not specifically Kool-Aid), perhaps to soften the taste. They all drink poison, lay down and die.

Kool-Aid Man, Or more commonly Rick Ross in a red jumpsuit.

giant thing of kool aid.often bust through the wall when peter griffin is in court

A very unfortunate incident in which a man (or woman) performes cunnalingus and the recieving woman menstrates on the man. This obviously results in the giver having a red "mask". Following this, the giver shouts "OH YEAH!" and runs through the wall. Like the old Kool Aid advertisements.