パシッ

パシッ, ぱしっ, パシっpashi

adverb

  1. with a loud smack
  2. whack
  3. slap
  4. crack
  5. snap

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences