Flap, v. i. 1. To
move as do wings, or as something broad or loose; to fly with wings
beating the air.
The crows flapped over by twos and
threes.
Lowell.
2. To fall and hang like a flap, as the brim
of a hat, or other broad thing. Gay.
Flap, v. t. [imp. & p.
p. Flapped (?); p. pr. & vb. n.
Flapping (?).] [Prob. of imitative origin; cf. D.
flappen, E. flap, n., flop, flippant,
fillip.] 1. To beat with a flap; to
strike.
Yet let me flap this bug with gilded
wings.
Pope.
2. To move, as something broad and flaplike;
as, to flap the wings; to let fall, as the brim of a
hat.
To flap in the mouth, to taunt. [Obs.]
W. Cartwright.
Flap (?), n. [OE. flappe,
flap, blow, bly-flap; cf. D. flap, and E. flap,
v.] Anything broad and limber that hangs
loose, or that is attached by one side or end and is easily moved;
as, the flap of a garment.
A cartilaginous flap upon the opening of the
larynx.
Sir T. Browne.
2. A hinged leaf, as of a table or
shutter.
3. The motion of anything broad and loose, or
a stroke or sound made with it; as, the flap of a sail or of a
wing.
4. pl. (Far.) A disease in the
lips of horses.
Flap tile, a tile with a bent up portion, to
turn a corner or catch a drip. -- Flap valve
(Mech.), a valve which opens and shuts upon one hinged
side; a clack valve.