1
- informal a cramped or squalid room or building〈非正式〉肮脏的地方; 陋室。
2
- N. Amer. informal used to refer to the waste of money or resources〈北美, 非正式〉无底洞（用以指对金钱或资源的浪费）：
pouring our assets down the rathole of military expenditure.
让我们的资产流入军费开支的无底洞。
3
- (in the oil industry) a shallow hole drilled near a well to accommodate the drill string joint when not in use（石油工业）储放钻杆的浅孔。
3.1
- a small hole drilled at the bottom of a larger hole（大钻孔的）导孔。
with obj.
- N. Amer. informal hide (money or goods), typically as part of a fraud or deception〈北美, 非正式〉（尤指为了欺诈、欺骗而）隐藏, 掩藏（货币, 货物）。