"plops" in the noun sense
the noise of a rounded object dropping into a liquid without a splash
"plops" in the verb sense
drop something with a plopping sound
drop with the sound of something falling into water
3. plank, flump, plonk, plop, plunk, plump down, plunk down, plump
set (something or oneself) down with or as if with a noise
"He planked the money on the table"
"He planked himself into the sofa"
Source: WordNet® (An amazing lexical database of English)
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