designated driver
US /ˌdez.ɪɡ.neɪ.tɪd ˈdraɪ.vər/
UK /ˌdez.ɪɡ.neɪ.tɪd ˈdraɪ.vər/

1.
지정 운전자, 대리 운전자
a person in a group who is chosen to drive everyone home safely after drinking alcohol, and who therefore does not drink any alcohol themselves
:
•
I'm the designated driver tonight, so no drinks for me.
오늘 밤은 내가 지정 운전자라서 술은 안 마셔.
•
They took turns being the designated driver for their group outings.
그들은 단체 외출 시 지정 운전자를 번갈아 가며 맡았다.