kill the donkey the moment it leaves the millstone—give sb. the boot as soon as he has done his job
卸磨杀驴
kill the donkey the moment it leaves the millstone—get rid of sb as soon as he has done his job
卸磨杀驴xiè mò shā lǘ
把拉完磨的毛驴卸下来杀掉。比喻不顾情义,过河拆桥,把曾经为自己效力过的人一脚甩开。get rid of sb. as soon as he has done his job, kill the donkey the moment it leaves the millstone