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Jyutping coi2 hung4 pei3
Pinyin cǎi hóng pì

Definitions (Wiktionary)
  1. noun, neologism, slang
    irrationally high praise of one's idol; glowing terms

彩虹屁 [---]

Jyutping
Pinyin cǎi hóng pì

Definitions (CC-CEDICT)
  1. (neologism c. 2017) (slang) over-the-top praise