Flop (verb)

1. To fall or lie down heavily or suddenly.
2. To fail completely, especially in a spectacular and public way.
3. To make a sudden movement with a flapping motion.

Origin:

Origin uncertain, possibly from dutch flop "slap", or imitative.

Examples:

1. The drunk man flopped onto the sidewalk.
2. The movie was a flop at the box office.
3. The fish flopped around on the deck of the boat.
4. The dog flopped down on the couch.
5. The curtains flop in the breeze.