plop
  Pronunciation: (plop), [key]    — v., n., adv. plopped, plop•ping, 
  
 
—v.i. - to make a sound like that of something falling or dropping into water: A frog plopped into the pond. 
- to fall with such a sound: Big raindrops plopped against the window. 
- to drop or fall with full force or direct impact: He plopped into a chair. 
 
—v.t. - to drop or set down heavily: She plopped her books on the desk. 
- to cause to plop: The fisherman plopped the bait into the river. 
 
—n. - a plopping sound or fall.  
- the act of plopping.  
 
—adv. - with a plop: The stone fell plop into the water. 
 
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.