through the back door
US /θruː ðə bæk dɔːr/
UK /θruː ðə bæk dɔːr/

1.
走后门, 暗中
by indirect, unofficial, or secret means
:
•
He tried to get the job through the back door by using his connections.
他试图通过利用人脉走后门来获得这份工作。
•
They passed the new regulation through the back door without much public debate.
他们未经太多公开辩论就暗中通过了新规定。