be wearing your teacher's/salesman's etc hat (also have your teacher’s/salesman’s etc hat on) informalWORK/DO WORK to be performing the duties of a teacher etc, which are not your only duties 干着老师/销售员等的工作〔指做不止一份工作〕 I’m a manager now and only put my salesman’s hat on when one of our sales reps is having real problems. 我现在当经理了,只有当我们的销售代表遇到真正的难题时我才做销售工作。
→ be wearing your teacher’s/salesman’s etc hat at hat(2)