#1 TOP DEFINITION
역주행 — reverse run. When a song, album, or artist unexpectedly surges in popularity long after its original release — the opposite of the typical downward chart trajectory. A yeokjuhaeng can be triggered by a viral clip, a drama OST placement, or a challenge. It's one of the most celebrated phenomena in K-pop.
Example
“TWICE's 'Cheer Up' had a famous yeokjuhaeng — a TikTok dance trend 4 years after release pushed it back into the top 10.”
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