[f. THWACK v. + -ING1.] The action of the verb THWACK in various senses. Also attrib.: thwacking-frame, a stand on which pantiles are beaten into shape; thwacking-horse, -stool, a bench on which the thwacking-frame is placed; thwacking-knife, a knife for trimming the edges of pantiles.

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1736.  Ainsworth, Lat. Dict., I. A thwacking, verberatio, fustuarium, fustigatio.

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1760.  Mair, Tyro’s Dict. (1820), 372. Stipatio,… a cramming or thwacking of things together.

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1820.  W. Irving, Sketch Bk., II. 107. We heard a distant thwacking sound,… the rolling pin, struck upon the dresser by the cook.

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1867.  Thwacking frame [see THWACKER 1].

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1895.  Zangwill, Master, III. ix. The thwacking of the dancers’ feet in the barn.

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