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English definition of “flap”

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flap

verb
 
 
/flæp/ ( present participle flapping, past tense and past participle flapped)
WINGS [T] If a bird flaps its wings, it moves them up and down.Animal (non-human) behaviour
MOVE [I] If something such as cloth or paper flaps, the side that is not fixed to something moves around, especially in the wind: The curtains were flapping around in the breeze.Shaking, swinging and vibrating
WORRY [I] informal to become worried or excited about something: Don't flap! We've got plenty of time to get to the airport.Anxious and worried
(Definition of flap verb from the Cambridge Learners Dictionary © Cambridge University Press)
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