to write checks you can't cash
- idiom
- Informal
- It's easy to write checks you can't cash in a negotiation when you're trying to impress someone.
Examples
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Be careful not to write checks you can't cash when making promises about the project timeline.
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Don't write checks you can't cash.
Blog text (20) -
You shouldn't write checks you can't cash by promising free services if you're not sure you can deliver them.
Synonyms
To fail to do what you said you would do
To fail to pay a debt or keep a promise after an agreement
To fail to keep a promise or pay a bet
Tell someone you will do something very big although you cannot do it
Fail to do something you promised, often by not paying what you owe
Antonyms
How Reliable
Surface Forms
Morphology
write + check + you + can't + cash
The phrase draws a metaphor from banking: 'write checks' (issue a payment order) and 'cash' (redeem for money), so a learner who knows those words can plausibly infer the sense of making promises one cannot fulfill. However the mapping is idiomatic and relies on cultural knowledge about checks as promissory instruments, so the relation is not fully predictable for all learners without prior exposure.
Etymology
The idiom write checks you can't cash comes from the bank image of writing a check for money you do not have. When someone tries to cash that check, the bank will not give the money, so it means making 'promises' you cannot keep.