Flap, v. t. [imp. & p. p. Flapped p. pr. & vb. n. Flapping ]
1. To beat with a flap; to strike.
Yet let me flap this bug with gilded wings. --Pope.
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. [Obs.]