informal <非正式>
1
- with obj. and adverbial of place set down heavily or carelessly重重（或粗心）地放下：
she plonked her glass on the table.
她把杯子重重地放在桌子上。
1.1
plonk oneself
sit down heavily and without ceremony重重而不拘礼节地坐下：he plonked himself down on the sofa.
他一屁股坐在沙发上。
2
- no obj. play on a musical instrument laboriously or unskillfully费力（或蹩脚）地演奏（乐器）：
people plonking around on expensive instruments.
笨拙地四处演奏昂贵乐器的人们。
- a sound as of something being set down heavily（重重放下发出的）砰的一声：
he sat down with a plonk.
他砰的一声坐了下来。
词源
late 19th cent. (originally dialect)： imitative; compare with PLUNK.