flapping

(noun) the motion made by flapping up and down. Synonyms: flap, flutter, fluttering.

(verb) move in a wavy pattern or with a rising and falling motion. Synonyms: roll, undulate, flap, wave. Examples: "The curtains undulated." "The waves rolled towards the beach."

(verb) move noisily. Synonyms: flap. Example: "Flags flapped in the strong wind."

(verb) move with a thrashing motion. Synonyms: beat, flap. Examples: "The bird flapped its wings." "The eagle beat its wings and soared high into the sky."

(verb) move with a flapping motion. Synonyms: beat, flap. Example: "The bird's wings were flapping."

(verb) make a fuss; be agitated. Synonyms: dither, flap, pother.

(verb) pronounce with a flap, of alveolar sounds. Synonyms: flap.