Plop /(plŏp)/

imp. & p. p. Plopped; p. pr. & vb. n. Plopping

1. To fall, drop, or move in any way, with a sudden splash or slap, as on the surface of water.

   The body plopped up, turning on its side.

1. to drop (something) so that it makes a plopping sound; especially, to drop with the sound of something falling into water.
2. To set down quickly, so as to make a sound; -- used often with the reflexive; as, He plopped himself into the sofa.

1. Act of plopping; the sound made in plopping.