to know where it's been
- idiom
- Informal
- You don't know where it's been.
Examples
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You don't know where it's been!
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- I know where it's been.
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You never know where it's been.
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I know where it's been.
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- I don't know where it's been!
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You don't wanna know where it's been.
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We don't know where it's been.
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We don't know where it's been.
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"Don't touch that thing, you don't know where it's been!"
Fiction book (2000) -
"Don't touch that thing, you don't know where it's been!"
Synonyms
To know the past events that lead to something
Surface Forms
Morphology
The phrase is compositional: 'know' plus the clause 'where it's been' (where it has been) directly expresses having knowledge of an object's prior locations or history. Any pragmatic inference (e.g. caution about cleanliness) follows from that literal meaning, so a B1 learner who knows the constituents should be able to understand it.
Etymology
Know where it's been paints a simple picture: you do not know the places something has been, so it might be dirty or used by others. So, it means 'to know the past of something and be careful because it might be dirty'.