1 N-COUNT (浴缸或水槽的)排水孔,出水口 A plughole is a small hole in a bath or sink which allows the water to flow away and into which you can put a plug. (浴缸或水槽的)排水孔,出水口 [British]
in AM, use 美国英语用 drain
2 PHRASE [VERB inflects] 失败;丢失;白白浪费 If you say that something has gone down the plughole, you mean that it has failed or has been lost or wasted. 失败;丢失;白白浪费 [British, informal]
in AM, use 美国英语用 down the drain
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