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Jyutping wai4 faan6
Pinyin wéi fàn

Definitions (Wiktionary)
  1. noun, neologism, slang
    fan who only likes a certain member of an idol group, and remains neutral toward or even dislikes the other members
    (syn.) 唯粉

唯飯 [-饭]

Jyutping
Pinyin wéi fàn

Definitions (CC-CEDICT)
  1. fan who only likes one particular member of a pop idol band