ボキボキ

ボキボキ, ポキポキ, ぽきぽき, ぼきぼきbokiboki

adverb

  1. cracking sound (e.g. cracking one's knuckles)
  2. crunching sound

Study it in Yanamino

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