Similar words: lope, flop, slop, slope, gallop, elope, floppy, sloppy. Meaning: [plɑp /plɒp] 
n. the noise of a rounded object dropping into a liquid without a splash. v. 1. drop something with a plopping sound 2. drop with the sound of something falling into water 3. set (something or oneself) down with or as if with a noise. adv. with a short hollow thud.
n. the noise of a rounded object dropping into a liquid without a splash. v. 1. drop something with a plopping sound 2. drop with the sound of something falling into water 3. set (something or oneself) down with or as if with a noise. adv. with a short hollow thud. 
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1. The stone fell into the water with a plop.
2. Another drop of water fell with a soft plop.
3. Can you just plop some ice in my drink?
4. The stone fell with a plop into the river.
5. The stone fell plop into the water.
6. Her earring went plop into the soup.
7. Down the road you'll see a park.Plop down there if you like.
8. Did you hear it plop?
9. A prim plop as it landed, sank.
10. The hobo could not flow, could not plop.
11. The green ones held on tighter, didn't plop into her palms but had to be tugged.
12. It came out with a sickening plop and a gushing gout of blood.
13. There was a plop as it landed in the water, then it thrashed around wildly for a few seconds before settling down.
14. The soap fell plop into the bath.
15. Plop! The big stone dropped into the pond.
16. A stone fell plop into the water.
17. Quick unexpected frog goes Plop!
18. The cork came out plop.
19. Just plop the noodles over the center of the sauce.
20. Down the road you'll see a Plop down there if you like.
21. He dropped a pebble from the bridge and waited for the plop.
22. The soap fell into the bath with a loud plop.
23. Rain was dripping through the roof in several places, falling with a recurrent plop and splash on to the wet floor-boards.
24. He eyed them and tossed the small ones over his shoulder into the water with a plop.
25. Slowly, she revolved it(sentencedict.com), before pulling it out with a plop.
26. And suddenly, with the water, out came the long slimy newt straight into the glass, plop!
27. Three quiet days went past in the slow slap and plop of the river.
28. He dropped the stone and it rolled a little before falling into the water with a soft plop.
29. The frog reached the stream and jumped in with a plop.
30. He dropped a pebble from the bridge and waited for plop.