N-COUNT 叛徒;变节者 If you describe someone as a turncoat, you think they are disloyal or deceitful, because they have left their party or organization and joined an opposing one.
His one-time admirers now accuse him of being a turncoat. 曾经一度仰慕他的人如今指责他是叛徒。
Such a vulnerable government, dependent on the votes of turncoats and nonagenarians, will struggle to implement a coherent programme. 如此脆弱的政府,在争取中间党派参议员和终身参议员的前提下,将会艰难出台一个整合计划。