打榧子 [－－－]

Jyutping daa2 fei2 zi2
Pinyin dǎ fěi zi

Definitions (Wiktionary)
  1. verb, verb-object
    to snap one's fingers
    (syn.) 擉掌头仔, 擉手, 擉掌頭仔, 打響指, 打响指