flapping (Noun) — The motion made by flapping up and down. ex. "the sudden flapping of the startled pigeons"
flapping (Noun) — (phonology) a phonological process found in many dialects of English, especially American English and Canadian English, by which intervocalic /t/ and /d/ surface as the alveolar flap before an unstressed syllable, so that words such as "metal" and "medal" are pronounced similarly or identically.
flapping (Verb) — Move in a wavy pattern or with a rising and falling motion. ex. "the waves flapped towards the beach"
flapping (Verb) — Move noisily. ex. "flags flapped in the strong wind"
flapping (Verb) — Move with a thrashing motion. ex. "The bird flapped its wings"
flapping (Verb) — Move with a flapping motion. ex. "The bird's wings were flapping"
flapping (Verb) — Make a fuss; be agitated.
flapping (Verb) — Pronounce with a flap, of alveolar sounds.