plunk

(noun) a hollow twanging sound.

(noun) (baseball) hitting a baseball so that it drops suddenly. Synonyms: plunker.

(verb) make or move along with a sound as of a horse's hooves striking the ground. Synonyms: clop, clump, clunk.

(verb) set (something or oneself) down with or as if with a noise. Synonyms: plank, flump, plonk, plop, plump down, plunk down, plump. Examples: "He planked the money on the table." "He planked himself into the sofa."

(verb) drop steeply. Synonyms: dive, plunge. Example: "The stock market plunged."

(verb) pull lightly but sharply with a plucking motion. Synonyms: pluck, pick. Example: "He plucked the strings of his mandolin."

(adv) with a short hollow thud. Synonyms: plop. Example: "Plop came the ball down to the corner of the green."