can of worms
The idiom "can of worms" warns against actions or topics that could lead to a multitude of unforeseen complications.
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Definition
B2General
(idiomatic)A situation that, when addressed, leads to numerous unexpected problems.
Example
- Discussing the budget cuts opened a can of worms for the committee.
- Bringing up the past mistakes turned the meeting into a can of worms.
Similar
Terms that have similar or relatively close meanings to "can of worms":