Answer: THWACKS

AnswerCrossword Clue
THWACKSHeavy blows
THWACKSSharp blows
THWACKSHits hard
THWACKSSlapstick sounds.
THWACKSHits
THWACKSHard blows
thwacksStrike forcefully with a sharp blow
thwacksTHWACK, to strike with something flat