fall asleep at the wheel

의미:
운전석에서 졸다, 졸음운전하다; 방심하다, 의무를 태만히 하다
예시:
The government fell asleep at the wheel in the early stages of the wreck.
She fell asleep at the switch to finish her alloted work.
Watchdogs fell asleep at the wheel when they should have known about the dent in the company’s finances.