|Origin:||From the sound|
plop2 past tense and past participle plopped, present participle plopping
1 [intransitive always + adverb/preposition]
to fall somewhere, making a sound like something dropping into water
plop into/out of/onto etc
The frog plopped back into the pond.
to drop something, especially into a liquid, so that it makes a sound
plop something into something
I plopped a couple of ice cubes into the drink.
to sit down or lie down heavily:
She plopped down on the sofa beside me.