boko-boko
The dull, repeated thumping of fists hitting something — punching a sandbag, beating someone up, or a series of dented impacts.
💡Boxing practice — 'He hit the sandbag boko-boko without stopping.'
サンドバッグをぼこぼこに殴った。
He punched the sandbag boko-boko.
The boxer ___ pummeled the heavy bag during training.
ボクサーが練習でサンドバッグを○○に殴った。