Definition of plunks:
(n) :
A brief, dull sound, such as the sound of a string of a stringed instrument being plucked, or the thud of something landing on a surface.
(adv) :
With a brief, dull sound, such as the thud of something landing on a surface.
(v) :
(intransitive) To make a brief, dull sound, such as the thud of something landing on a surface; to thud.
(v) :
(transitive) (music) To pluck and quickly release (a string of a stringed instrument); also, to play (a stringed instrument) by plucking strings; to play (a piano, etc.) by striking keys; or, to play (a note or tune) on such an instrument.
(v) :
(transitive) To move (something) with a sudden push.
(v) :
(transitive) (chiefly US) To hit or injure (someone or something); also, to shoot (someone or something) with a firearm.