the world > physical sensation > hearing and noise > degree, kind, or quality of sound > repeated sound or succession of sounds > [noun] > flapping sound (5)
‘The motion of something broad and loose’ (Johnson), as a wing or a fly-flapper; the noise produced by its motion, or by contact with some other…
The sound of the flapping of the wings of a large bird or a flight of birds.
The repeated flapping sound caused by loosely-worn shoes.
a snigger; a whinny; also, the sound of something beating the air.