let the genie out of the bottle
idiomPart ofbottle
let the genie out of the bottle — idiom
1. To take an action that causes major changes and cannot be undone.
1.idiom
Definition
To take an action that causes major changes and cannot be undone.
Example
By releasing the virus data, the scientist let the genie out of the bottle.
Did the new law let the genie out of the bottle for online privacy?