flap around
To wave about in the air, possibly due to being unencumbered or unrestrained. You better secure that sheet—otherwise, it'll be flapping around in the wind. A: "What's that noise?" B: "Oh, just the flags flapping around." Why would you hang my undergarments on the clothesline? I don't want them flapping around for the whole neighborhood to see!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
flap around
[for a sheet of something] to blow, flop, or slap around, perhaps in the wind. The sails flapped around, making a lot of noise. The awning flapped around during the night.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.