Chaego

Adj. The Korean word for "best" (최고). Pronounced "cheh go" or "chay go". Also can be spelled "choego" or "chego" but "chaego" is more in fashion.

Ex 1)

Person 1: How's the burger you ordered?
Person 2: It's chaego dude. Best burger I've had in a while.

Ex 2)

Person 1: What do you think of BTS?
Person 2: Extremely chaego.

Ex 3)

Person 1: Which one of these shows is your favorite?
Person 2: I like the first two, but the last is chaego.