plunk down (蓦地)重重放下(或落下)；(使)重重倒下；〈口〉(啪地)扔下(钱)付款 He plunked down a bag on my desk. 他把一包东西啪地扔在我书桌上。 plunk oneself down on a couch 一屁股倒在长沙发上 plunkdown and take a nap 倒头睡个午觉 He has to line up every Saturday to plunkdown ＄20.00 for a car wash. 每星期六他都得去排队，付出20块钱让人擦洗汽车。