To drop or sink heavily and noisily
This way, whether you want to relax and lie out, or if friends plop by for a quick can of soda, you'll have enough room for you all!
plop into the water and dive.
His mood swings become intuitive; every plop in the water is a meal.
We hear the plop of a frog jumping into the canal.
It lands with a soft plop in the pint of Worthington Mild in front of the largest of them.