Flap
- 5-lipoxygenase activating protein
- Bird flight
- Bum flap
- Flap (aeronautics)
- Flap (film)
- Flap (surgery)
- Flap consonant
- Flapper (disambiguation)
- Flapping
- Flapping tremor
- Free flap
- Gaiapolis
- Helicopter rotor
- Link flap
- Mudflap
- Oscillation
- Pet door
- Roof flap
- Route flapping
- Sluice
- State (computer science)
- Stimming