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Jyutping lei6 lei6 sei3 sap6
Pinyin lì lì sì shí

Definitions (粵典–words.hk)
  1. 名詞、俚語、黃賭毒
    鎮抑劑​「​速可眠​」​嘅​俗​稱​,​又​稱​「​速可​巴比​妥​」
    a common name for the depressant Seconal, also known as secobarbital and quinalbarbitone

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Jyutping lei6 lei6 sei3 sap6
Pinyin lì lì sí4shi

Definitions (CC-CANTO)
  1. seconal (quinalbartitone, a type of depressant) [colloquial]