Whap, Whop , v. t. [imp. & p. p. Whapped p. pr. & vb. n. Whapping.] To beat or strike.
  Whap·ping Whop·ping , a. Very large; monstrous; astonishing; as, a whapping story.  [Colloq.]
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  whap
       v : hit hard [syn: sock, bop, whop, bonk, bash]
       [also: whapping, whapped]