hang by a thread
be in a precarious situation
hangs by a thread
precarious, insecure, loosely or barely held together, lacking basis
hang by a thread
Verb
1. depend on a small thing or be at risk; "His life now hangs by a thread"
(synonym) hand by a hair
(hypernym) depend
hang by a thread
be in doubt, depend on a very small thing The outcome of the election hung by a thread until the last two or three hours.