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Flap may refer to:

The arts[edit]


  • 5-lipoxygenase activating protein (FLAP)
  • brouhaha, a general state of social agitation
  • Flap (aeronautics), a hinged surface on the trailing edge of an airplane wing
  • flapping, the up-and-down motion of the helicopter blade tip to provide near equal lift on right and left sides of the rotor disc
  • flapping, one of the basic mechanics of flight in birds
  • flap (surgery), a surgical technique involving movement of vascularized tissue
    • free flap, a specific kind of surgical flap
  • flap consonant, a sound produced by brief contact between the tongue and the roof of the mouth
  • flap, any hinged plate often used as a cover or a simple one-way valve
    • bum flap (or butt flap), a separately removable part of underwear (un)covering the buttocks
    • cat flap or pet door, a hinged flap that allows a cat or other small pet to enter or leave a room or building
    • sluice or flap gate, a pressure driven water flow control device between a channel and other water body
  • roof flap, an aerodynamic feature of race cars
  • route flapping, when a router alternately advertises a destination network first via one route then another

See also[edit]