1. What does it mean?
금사빠 shortens 금방 사랑에 빠지는 사람. It can be a playful self-description for someone who gets swept up in attraction after a small encounter.
Also written or said as geumsappa
2. The nuance
Falling quickly does not necessarily mean the feeling disappears quickly; 금사식 names that separate pattern. Neither label diagnoses a personality or tells you whether affection is sincere.
3. Examples
“길을 친절하게 알려 줬다고 설레다니 나 금사빠인가 봐.”
Getting butterflies just because they kindly gave directions? I may fall for people too easily.
“친구는 금사빠라고 농담하지만 실제 연애는 신중하게 해.”
My friend jokes about catching feelings quickly but takes actual relationships seriously.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.