thwack

To strike or hit with a flat object; whack.

A hard blow with a flat object; a whack.

To strike with something flat or hard; beat; bang; whack.

To ram down; pack.

A sharp blow with something flat or hard; a whack; a bang.

Synonyms See thump.

To strike with something flat or heavy; to bang, or thrash: to thump.

To fill to overflow.

A heavy blow with something flat or heavy; a thump.

The act of thwacking; a strike or blow, especially with a flat implement.