plop

A sound or action like liquid hitting a hard surface, or an object falling into a body of water.

He heard the plops of rain on the roof.

Excrement.

To make the sound of an object dropping into a body of liquid.

Stooping, she picked up another pebble, sounded out the word again, and tossed it into the shallow water near the path, where it plopped into the water, sending out circles from where it fell.

To land heavily or loosely.

He plopped down on the sofa to watch TV.

As the sun plops into the Pacific off Venice Beach, California, the four of us are sitting in a rented car at the corner of Rose and Main.

To defecate.

Indicating the sound of something plopping.

"[A]fter a bit the old ship went down all on a sudden with a lurch to starboard---plop. The suck in was something awful."