To clap or strike, as a bird its wings, a fish its tail, etc.; to flap.
- To fall or lie down heavily and noisily.
- To move about loosely or limply: The dog's ears flopped when it ran.
- Informal To fail utterly: The play flopped.
- Slang To rest idly; lounge.
- Slang To go to bed.
- To drop or lay (something) down heavily and noisily: flopped the steak onto a platter.
- The act of flopping.
- The sound made when flopping.
- Informal An utter failure.