flap

Short definition from Wiktionary

Noun

1. 1
   Anything broad and flexible that hangs loose, or that is attached by one side or end and is easily moved.
2. 2
   A hinged leaf.
3. 3
   A hinged surface on the trailing edge of the wings of an aeroplane, used to increase lift and drag.
4. 4
   A side fin of a ray.
5. 5
   The motion of anything broad and loose, or a sound or stroke made with it.
6. 6
   A controversy, scandal, stir, or upset.
7. 7
   A consonant sound made by a single muscle contraction, such as the sound /ɾ/ in the standard American English pronunciation of body.
8. 8
   A piece of tissue incompletely detached from the body, as an intermediate stage of plastic surgery.
9. 9
   The labia, the vulva.
10. 10
    A blow or slap (especially to the face).
11. 11
    A young prostitute.
12. 12
    A connected component of the induced subgraph formed by deleting a set of vertices.

Verb

1. 1
   To move (something broad and loose) up and down.
2. 2
   To move loosely back and forth.
3. 3
   For a goalkeeper to weakly attempt to play a flighted ball with the hands, failing to control it.
4. 4
   To pronounce (something) as a flap consonant.
5. 5
   To be pronounced with a flap consonant.
6. 6
   To be advertised as being available and then unavailable (or available by different routes) in rapid succession.