Thwack

[θwæk]

(noun.) a hard blow with a flat object.

Checked by Enrique--From WordNet

(v. t.) To strike with something flat or heavy; to bang, or thrash: to thump.

(v. t.) To fill to overflow.

(n.) A heavy blow with something flat or heavy; a thump.

Checked by Lemuel

v. a. [Colloquial.] Strike, beat, thump, belabor, whack, rap.

n. Blow, stroke, thump, pat, knock, rap.

Edited by Juanita

v.t. to strike with something blunt and heavy to thrash.—n. a heavy blow.

Edited by Claudette