1. What does it mean?
떡락 is emphatic slang for a sharp fall. It appears in price discussions and also in casual comments about views, reputation, game performance, or enthusiasm dropping dramatically.
Also written or said as tteongnak
2. The nuance
It is not a technical percentage or a prediction of what comes next. Online writers may use it for comic exaggeration, so check the underlying facts before taking the drama literally.
3. Examples
“초반엔 잘됐는데 후반 기록이 떡락했어.”
It went well at first, but my later scores dropped sharply.
“떡락했다는 글과 실제 수치를 따로 확인했어.”
I checked the actual figures separately from the post claiming a collapse.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.