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Jyutping lok6 bat1 ho2 zi1
Pinyin lè bù kě zhī

Definitions (CC-CEDICT)
  1. overjoyed (idiom); as pleased as punch
Definitions (Wiktionary)
  1. phrase, idiomatic
    overjoyed; on cloud nine
Examples (Wiktionary)
  1. Mandarin
    乐不可支
    樂不可支
    lè bù kě zhī
    • to be overwhelmed with joy