Webster's Dictionary (GCIDE)
Whap
\Whap\, Whop
\Whop\, v. t. [imp. & p. p.
Whapped; p. pr. & vb. n.
Whapping.] To beat or strike.
[1913 Webster] Whap
Whapping \Whap"ping\, Whopping \Whop"ping\, a. Very large; monstrous; astonishing; as, a whapping story. [Colloq.] [1913 Webster]