Hypertext Webster Gateway: "thwacking"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Thwack \Thwack\ (thw[a^]k), v. t. [imp. & p. p. {Thwacked}; p.
pr. & vb. n. {Thwacking}.] [Cf. OE. thakken to stroke, AS.
[thorn]accian, E. whack.]
1. To strike with something flat or heavy; to bang, or
thrash: to thump. ``A distant thwacking sound.'' --W.
Irving.
2. To fill to overflow. [Obs.] --Stanyhurst.
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