Pan‧do‧ra’s box /pænˌdɔːrəz ˈbɒks $ -ˈbɑːks/
noun[
Date: 1500-1600;
Origin: Pandora woman in an ancient Greek story who opened a box and let all evils out into the world]
open a Pandora’s box to do or start something that will cause a lot of other problems:
The report could open up a Pandora’s box of claims from similar cases. [TahlilGaran] Dictionary of Contemporary English ▲
pandora's box n. phr.,
literary A thing or problem that, if activated, will give rise to many unmanageable problems.
If they insist on having that inquiry, they will open up a Pandora's box. Compare: CAN OF WORMS.
[TahlilGaran] English Idioms Dictionary ▲