(the motion made by flapping up and down)
(move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach")
(move noisily; "flags flapped in the strong wind")
(move with a thrashing motion; "The bird flapped its wings"; "The eagle beat its wings and soared high into the sky")
(move with a flapping motion; "The bird's wings were flapping")
(make a fuss; be agitated)
(pronounce with a flap, of alveolar sounds)