noun act of flopping.
2. flop ·vt to turn suddenly, as something broad and flat.
3. flop ·vi to fall, sink, or throw one's self, heavily, clumsily, and unexpectedly on the ground.
4. flop ·vt to clap or strike, as a bird its wings, a fish its tail, ·etc.; to flap.
5. flop ·vi to strike about with something broad abd flat, as a fish with its tail, or a bird with its wings; to rise and fall; as, the brim of a hat flops.