打猛子 [－－－]

Jyutping daa2 maang5 zi2
Pinyin dǎ měng zi

Definitions (Wiktionary)
  1. verb
    to dive headfirst into water; to swim with your head underwater
    (syn.) 沉沬, 打沒頭壇, 扎猛子, 打没头坛