Ulzzang: Means "best face" in Korean, and refers to people who are way better looking then the average. They usually posses large eyes, porcelain-smooth skin and are champions in online modeling contests. Ulzzangs are popular on social media sites, and often work for various Asian clothing sites.
Example: Park Tae Jun
Unnie: Means "older sister" in Korean and is used by younger girls when speaking to older girls who are related or not. Can also be used by a catty girl with the aim to put down a girl similar in age to her.
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KPOP Dictionary
عشوائيA little something to make you understand what the eff people are talking about these days.