whap

{ }, v. i. [ Cf. OE. quappen to palpitate, E. quob, quaver, wabble, awhape, wap. ] To throw one's self quickly, or by an abrupt motion; to turn suddenly; as, she whapped down on the floor; the fish whapped over. Bartlett. [ 1913 Webster ]

☞ This word is used adverbially in the north of England, as in the United States, when anything vanishes, or is gone suddenly; as, whap went the cigar out of my mouth. [ 1913 Webster ]