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1. The motion made by flapping up and down
   - flap, flutter, fluttering

1. Move in a wavy pattern or with a rising and falling motion
   - roll, undulate, wave
    
2. Move noisily
   "flags flapped in the strong wind"
    
3. Move with a thrashing motion
   "The bird flapped its wings"
   - beat
    
4. Move with a flapping motion
   "The bird's wings were flapping"
   - beat
    
5. Make a fuss; be agitated
   - dither, pother
    
6. Pronounce with a flap, of alveolar sounds

Derived forms: flappings

Type of: articulate, beat, displace, enounce, enunciate, fret, fuss, move, niggle, pound, pronounce, say, sound out, thump, undulation, wave

Encyclopedia: Flap