back door
noun/ˌbæk ˈdɔː(r)/
/ˌbæk ˈdɔːr/
Idioms - the door at the back or side of a building
后门；边门
Idioms
by/through the back door
- in an unfair or indirect way
走后门 - He used his friends to help him get into the civil service by the back door.
他利用朋友帮他开后门当上了公务员。
- He used his friends to help him get into the civil service by the back door.