Noun
-
the noise of a rounded object dropping into a liquid without a splash
Verb
-
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"
- plump down - plunk down -
drop with the sound of something falling into water
-
drop something with a plopping sound
Adverb
-
with a short hollow thud
"plop came the ball down to the corner of the green"