v. i. [ imp. & p. p. Plopped p. pr. & vb. n. Plopping. ] [ Imitative. ] 1. To fall, drop, or move in any way, with a sudden splash or slap, as on the surface of water. [ Webster 1913 Suppl. ]
The body plopped up, turning on its side. Kipling. [ Webster 1913 Suppl. ]
v. t. 1. to drop (something) so that it makes a plopping sound; especially, to drop with the sound of something falling into water. [ wns=1, 2 ] [ WordNet 1.5 ]
2. To set down quickly, so as to make a sound; -- used often with the reflexive; as, He plopped himself into the sofa. [ wns=3 ] Syn. -- plank, flump, plonk, plunk, plump down, plunk down, plump. [ WordNet 1.5 ]