快樂丸 [－乐－]

Jyutping faai3 lok6 jyun2
Pinyin kuài lè wán

Definitions (Wiktionary)
  1. noun, Taiwan
    ecstasy; MDMA
    (syn.) 揈头丸, 爱它死, E仔, 搖頭丸, 狂药, 揈頭丸, 摇头丸, 衣服, 愛它死, 狂藥, 疯药, 瘋藥