나 원래 아싸인데 오늘은 인싸 됐어

The line, explained

Everyone has had a night like this: you are normally the one quietly holding a drink by the wall, and then somehow you end up at the centre of the party. Korean slang has two perfect words for that before-and-after: 아싸, the outsider, and 인싸, the insider. This line uses both, and it is the kind of message that lands in a group chat the morning after, half proud and half surprised.

나 is the casual 'I'. In texts and chat, it often stands alone without the topic marker 는. 원래 means originally or by nature, and in everyday speech it means 'normally, usually'. 나 원래 그래 is 'that's just how I am'. Here, 원래 sets up the contrast: this is who I usually am. In sound, 원래 is pronounced as if it were 월래, because ㄴ next to ㄹ turns into ㄹ, so it is wol-lae.

아싸 is short for 아웃사이더, the English word outsider written in Korean. It started on university campuses for students who skipped group events, and now means anyone who prefers to keep to themselves. 인싸, from 인사이더, insider, is its opposite: someone at the centre of every group, who knows every trend. 인데 is 이다, to be, plus the connecting -ㄴ데, 'is, but'. So 아싸인데 is 'I'm an outsider, but'.

오늘은 is 'today', with 은 adding contrast: today, unlike usual. 인싸 됐어 is 'became an insider'. The verb is 되다, to become, and its casual past is 됐어, pronounced dwae-sseo. With 되다 the noun often skips its particle 이 in speech, so it is just 인싸 됐어. Both slang words are nouns, so they also take 이다: 나 아싸야, I'm an outsider. And you can level them up: 핵인싸 is a super-insider, and 인싸템 is the trendy item everyone has.

Read it like a text you are a little proud of sending: na wol-lae a-ssa-in-de, then o-neu-reun in-ssa dwae-sseo. Then try other ways to finish the night: 오늘은 주인공 됐어, today I became the main character; 오늘은 분위기 메이커 됐어, today I became the mood-maker; 오늘은 핵인싸 됐어, today I became the ultimate insider. Most Koreans will happily call themselves 아싸, so do not worry, it is rarely an insult.