can of worms
Meaning
A complicated problem or situation that, once started, creates many more difficulties or questions.
Origin
From the literal idea of opening a bait can full of worms: once opened, the worms wriggle and scatter, creating a messy situation—used metaphorically for triggering complex complications.
Notes
Often used to warn that starting an action/topic will lead to many complications. Common in speech and writing; frequently appears as “open a can of worms.”
Examples
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Bringing up the budget cuts now would open a can of worms we’re not ready to deal with.
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I thought fixing the typo would be quick, but it turned into a whole can of worms.
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If we question his credentials in public, it could be a real can of worms.
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Talking about inheritance at dinner always opens a can of worms in this family.
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The investigation uncovered a can of worms involving several departments.
Grammar & Usage Notes
Usually appears with articles: “a can of worms.” Common patterns: “open a can of worms,” “it’s a can of worms,” “that would be a can of worms.” Plural possible when referring to multiple issues: “cans of worms.”
Synonyms
- pandora's box
- minefield
- hornet's nest
- mess
- bag of worms
Antonyms
- simple matter
- easy fix
- straightforward solution