
1) Alka Seltzer sound 2) Alka-Seltzer noise 3) Alka-seltzer sound 4) Beanbag-chair sound 5) Crash onto the sofa 6) Diving sound 7) Dripping sound 8) Drop 9) Drop heavily 10) Drop like a drop 11) Drop like drops 12) Drop noisily 13) Drop with a thud 14) Dull sound 15) Dull, faintly explosive sound 16) Fall carelessly
Found on
https://www.crosswordclues.com/clue/plop

1) Place 2) Thud
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https://www.crosswordclues.com/clue/plop

Plop is an onomatopoeic term for the sound of an object falling onto a surface or onto water. It may also refer to: PLoP refers to: PLOP refers to: ...
Found on
http://en.wikipedia.org/wiki/Plop

• (v. i.) To fall, drop, or move in any way, with a sudden splash or slap, as on the surface of water. • (n.) Act of plopping; the sound made in plopping.
Found on
http://thinkexist.com/dictionary/meaning/plop/

audible record fault, having a muted sound resembling that of a heartbeat
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=806-13-74
Plop intransitive verb [
imperfect & past participle Plopped ;
present participle & verbal noun Plopping .] [ Imitative.] To fall, drop, or move in any way, with a sudden splash or slap, as on the surface of water. « The body
plo...Found on
http://www.encyclo.co.uk/webster/P/109
Plop noun Act of plopping; the sound made in plopping.
Found on
http://www.encyclo.co.uk/webster/P/109

Plop is slang for to defecate.
Found on
http://www.probertencyclopaedia.com/browse/ZP.HTM

[
adv] - (informal) with a short hollow thud 2. [n] - the noise of a rounded object dropping into a liquid without a splash 3. [v] - drop something with a plopping sound 4. [v] - drop with the sound of something falling into water
Found on
http://www.webdictionary.co.uk/definition.php?query=plop
plunk adverb with a short hollow thud; `plop came the ball down to the corner of the green`
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.