ぼちゃん

ぼちゃん, ぽちゃん, ぼっとん, ポチャン, ボットンbochan

adverb

  1. with a splash
  2. with a plop

Study it in Yanamino

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