1. What does it mean?
패피 shortens the borrowed phrase 패션 피플, fashion people. It refers to someone interested in styling and fashion, often a person whose outfits attract attention for their coordination or distinctive choices.
Also written or said as 패션피플, paepi
2. The nuance
It is an informal label rather than a job title or proof of expertise. People may use it as a compliment, a playful self-description, or an exaggerated caption.
3. Examples
“색 조합 잘하는 친구한테 패피라고 불러 줬어.”
I called my friend a fashionista because they're good at combining colors.
“패피는 아니지만 옷 구경하는 건 좋아해.”
I'm no fashion expert, but I enjoy looking at clothes.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.