:to provide or do something that is missing or not getting done弥补；接替别人停下的工作
When he didn't get the pay raise he was expecting, he had to take another job to pick up the slack. [=to make up for the money he was not making]工资没有如愿增加，他只好再干一份工以补贴收入。
The manager has to take up the slack when employees don't do their jobs correctly.员工工作出错时，经理只好接手。