plink, plank, plunk - definitions from Ninjawords (a really fast dictionary)

plink: noun; °A short, high-pitched sound.; verb; °(with "out") (colloquial) To play a song or a portion of a song, usually on a percussion instrument such as a piano.

plank: noun; °A long, broad and thick piece of timber, as opposed to a board which is less thick.; °A political issue that is of concern to a faction or a party of the people and the political position that is taken on that issue.; verb; °To cover something with planking.

plunk: verb; °To drop or throw heavily (onto or into something) so that it makes a sound.

" Enrique plunked his money down on the counter with a sigh and bellied up to the bar. "; synonyms: flump, thud