v. phr. To fail in control or command; lose your strength, force, or ability to lead. Mr. Jones began to lose his grip: he no longer wanted the hard jobs, and he left decisions to others. When a locomotive engineer loses his grip, he is no longer trusted with express runs.
LOSE ONE'S GRIP
Meaning of LOSE ONE'S GRIP in English
American idioms English vocabulary. Английский словарь американских идиом. 2012