[with adverbial]sit, lean, or fall heavily and limply
（沉重无力地）坐下（或倚下、倒下）
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she slumped against the cushions 她无力地靠在软垫上
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(
be slumped )Denis was slumped in his seat. 丹尼斯无精打采地瘫在椅子上。
undergo a sudden severe or prolonged fall in price, value, or amount
（价格、价值或数量的）猛然严重下跌，长期下跌
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land prices slumped. 地价大幅走低。
fail or decline substantially
惨败；猛跌
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United slumped to another one-nil defeat. 联队成绩下滑，又以０比１惨败。
a sudden severe or prolonged fall in the price, value, or amount of something
（价格、价值或数量的）猛然严重下跌，长期下跌
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a slump in annual profits. 年利润下降。
a prolonged period of abnormally low economic activity, typically bringing widespread unemployment
经济不景气时期（多伴有大规模失业）。
a period of substantial failure or decline
低潮期，下降期
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Arsenal's recent slump. 阿森纳队最近的低潮期。
"late 17th cent. （in the sense ‘fall into a bog’）： probably imitative and related to Norwegian