#1 TOP DEFINITION
썸 — the undefined in-between stage before officially dating. From the English 'something' — as in 'there's something between us.' In Korean dating culture, 썸 is a recognized phase with its own vocabulary and rules. Fans apply it to idol OTPs (one true pairings) when there are subtle signs of romantic chemistry.
Example
“The way they kept looking at each other during the collab stages — pure 썸 energy. That friendship is either already a relationship or about to be.”
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Heard from an Idol
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