to put the toothpaste back in the tube
- idiom
- The company learned that they cannot put the toothpaste back in the tube after launching their flawed product.
Examples
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And you really can't put the toothpaste back in the tube once you've given out millions and millions of dollars of grants for what is now a suspect result.
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Once a decision is made, you can't put the toothpaste back in the tube and change things.
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After revealing the secret, he realized he couldn't put the toothpaste back in the tube.
Synonyms
To try to undo something you cannot change
Antonyms
Surface Forms
Morphology
put + the + toothpaste + back + in + the + tube
A learner who knows the words can easily grasp the literal image (once toothpaste is squeezed out you cannot put it back), which sketches the idea of an irreversible action. However, mapping that concrete image onto the abstract meaning ‘attempting to undo something irreversible’ requires metaphorical inference and familiarity with the idiomatic use, so it is not fully predictable from the parts alone.
Etymology
Put the toothpaste back in the tube comes from a simple picture: when you squeeze a toothpaste tube, you cannot put all the paste back into the tube. That's why the phrase means trying to 'undo what has been done' or 'take something back' when it is too late.