flap
verbUK /flæp/
US /flæp/
To move something up and down quickly.
The bird flapped its wings and flew away.
OTHER MEANINGS
2. A flat piece of material that covers an opening.
He lifted the flap of the tent to look outside.
3. A state of worry or excitement.
She got in a flap about the test.
4. To move noisily in the wind.
The flag flapped in the strong breeze.