A/the sword of Damocles
Definition 1 of 1
Pro Tip 1/3Historical Origin
Originally from an ancient Greek tale, symbolizes dire or extreme risk. 
Ever since the scandal, the CEO's career has been under the sword of Damocles.
Pro Tip 2/3Imminent Danger
The phrase suggests a threat could become reality at any moment. 
Living close to an active volcano is like having a sword of Damocles hanging over the village.
Pro Tip 3/3Emotional Weight
Conveys feelings of stress or anxiety due to the impending threat. 
With the court date approaching, the sword of Damocles hung heavily over him.