FLAP (2)
Source: 566, 567
flap (2). Flap, v. to bear, hit, move with noise, fall in flaps
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Flap, v. t. [imp. & p. p. Flapped (?); p. pr. & vb. n. Flapping (?).] [[Prob. of imitative origin; cf. D. flappen, E. flap, n., flop, flippant, fillip.]] 1. 1. To beat with a flap; to strike.
Yet let me flap this bug with gilded wings. Pope. 2. 2. To move, as something broad and flaplike; as, to flap the wings; to let fall, as the brim of a hat.
To flap in the mouth, to taunt. W. Cartwright.