flap

flap

verb

Definition of FLAP

to move or cause to move with a striking motion <the stirring sight of a huge flock of geese flapping their wings>

Synonyms beat, flail, flop, flutter, whip

Related Words bang, batter, buffet, knock, pound, smack, spank, thump; flick, flicker, flit; fan, oscillate, sway, swing; undulate, wave; palpitate, pulse, throb