plop

• POS: Interjection, Noun, Verb (usu participle)

CIDE DICTIONARY

plop, v. i. [Imitative.].

 To fall, drop, or move in any way, with a sudden splash or slap, as on the surface of water.
"The body plopped up, turning on its side."  [Webster 1913 Suppl.]

plop, n. 

 Act of plopping; the sound made in plopping.  [Webster 1913 Suppl.]

OXFORD DICTIONARY

plop, n., v., & adv.
--n.
1 a sound as of a smooth object dropping into water without a splash.
2 an act of falling with this sound.
--v. (plopped, plopping) intr. & tr. fall or drop with a plop.
--adv. with a plop.

Etymology

19th c.: imit.

THESAURUS

plop

abruptly, bang, blubber, boil, boil over, bubble, bubble over, bubble up, burble, cast, cave, cave in, chuck, clap, dash, decline, dive, droop, drop, effervesce, exactly, fall, ferment, fizz, fizzle, fling, flop, flop down, flump, flump down, flush, founder, full, give way, go down, guggle, gurgle, hastily, hiss, hurl, impetuously, impulsively, kerplunk, lapse, like a flash, like a thunderbolt, lower, nose-dive, of a sudden, on short notice, parachute, pitch, plank, plop down, plumb, plummet, plump, plunge, plunk, point-blank, pop, pounce, pounce on, pounce upon, precipitantly, precipitately, precipitously, precisely, right, sag, seethe, set, settle, settle down, sharp, simmer, sink, sink down, skin-dive, sky-dive, slap, slouch, slump, slump down, smack, smack-dab, sound, spang, sparkle, square, squarely, startlingly, stoop, straight, submerge, subside, sudden, suddenly, surprisingly, swag, swoop, swoop down, take a header, throw, thrust, toss, unawares, unexpectedly, without notice, without warning, work