How to say subtle romantic flirting in Korean
Korean: 플러팅[ peul-reo-ting ]

Meaning
플러팅 means small, sweet words or actions that show romantic interest. It is often subtle, so the person does not say their feelings directly. In Korean slang, people use it when someone acts extra charming, kind, or playful with a person they like.
Example sentences
친구가 "그거 플러팅이야?"라고 물었어.
My friend asked, 'Is that flirting?'
학교에서 지훈이가 나한테 플러팅했어.
Jihoon flirted with me at school.
카페 직원의 말이 플러팅처럼 들렸어.
The cafe worker's words sounded like flirting.
여행 가는 기차에서 옆자리 사람이 플러팅했어.
The person next to me flirted with me on the train trip.
