screen door on a submarine
- idiom
- Informal
- Her efforts to keep secrets in that family were as useful as a screen door on a submarine.
Examples
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Trying to fix that problem with a quick patch is like putting a screen door on a submarine.
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Investing in that project is like installing a screen door on a submarine.
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Debating with him about the rules was a screen door on a submarine.
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This plan is just a screen door on a submarine.
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Debating with him about the rules was a screen door on a submarine.
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Her efforts to keep secrets in that family were as useful as a screen door on a submarine.
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Trying to fix that problem with a quick patch is like putting a screen door on a submarine.
Synonyms
Something that fails to work or please people
An activity that uses your time but does not help you
Something that has no real purpose or value
Having no real use
Antonyms
How Useful
Surface Forms
Morphology
screen + door + on + a + submarine
The metaphor is directly inferable from the constituents: a 'screen door' (a mesh door) placed 'on' a 'submarine' (a vessel that operates underwater) would be pointless or counterproductive because it would let water in. This obvious real-world incompatibility makes the expression's meaning ('useless' or 'unsuited to its context') immediately clear to learners who know the component words.
Etymology
Screen door on a submarine is a saying that gives a clear, silly image: a screen door would let water into a submarine, so it would not work at all. That's why people use it to describe something 'useless or pointless'.