Slang, explained by the people who actually use it.

You don't know nothing about golf! (You don't know what G stands for in Golf! X)

From a 2000 MBC adult sitcom (Three Friends), where actor Yoon Da-hoon would say "jageop deureoganda" ("time to make my move") whenever he pursued a woman he liked. The word "jageop" (lit. "work/operation") caught on nationally as slang for a man actively trying to woo a woman.

"Infinite selfishness" — from the variety show Infinite Challenge, meaning a willingness to sacrifice others for your own joy or victory.

Started as a mocking imitation of singer MC Mong saying, on 2 Days & 1 Night, "Wow, that's so real, I got goosebumps."

"As long as it's not me" — popularized on the variety show 2 Days & 1 Night, where host Kang Ho-dong jokingly said it didn't matter what happened to the other members as long as he was spared. Meant as a joke, not literal advice.

"Like sesame seeds" — describes something done in meticulous, tiny detail, like scattering sesame seeds — e.g. small background jokes or details easy to miss.

Visually resembles a person collapsed on their knees, hands on the ground — used to express despair or defeat. Also written "orz."

Usually used while listening or responding to someone ("ㅇㅅㅇ... I see"). The related ㅇㅂㅇ is typically used as a question ("ㅇㅂㅇ? and then?"), while ㅇㅁㅇ signals understanding ("ㅇㅁㅇ! Ah-ha!"). Exact usage shifts depending on context.

You don't know nothing about golf! (You don't know what G stands for in Golf! X)

From a 2000 MBC adult sitcom (Three Friends), where actor Yoon Da-hoon would say "jageop deureoganda" ("time to make my move") whenever he pursued a woman he liked. The word "jageop" (lit. "work/operation") caught on nationally as slang for a man actively trying to woo a woman.

"Infinite selfishness" — from the variety show Infinite Challenge, meaning a willingness to sacrifice others for your own joy or victory.

Started as a mocking imitation of singer MC Mong saying, on 2 Days & 1 Night, "Wow, that's so real, I got goosebumps."