no-brainer
C1informal
Definition
Meaning
A decision or choice that is so obvious and easy that it requires no mental effort.
A situation, problem, or task that is extremely simple to understand or resolve; something self-evident.
Linguistics
Semantic Notes
Exclusively used as a countable noun. Implies a contrast with a more difficult alternative. Often carries a positive connotation of simplicity and obvious benefit.
Dialectal Variation
British vs American Usage
Differences
No significant meaning difference. Slightly more common in American English but fully established in British English.
Connotations
Equally informal and positive in both varieties.
Frequency
Common in both, with a slight edge in frequency in AmE. Not considered an Americanism in the UK.
Vocabulary
Collocations
Grammar
Valency Patterns
[It/That] is a no-brainer.[Subject] made it a no-brainer.Choosing X was a no-brainer.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “(It's) a no-brainer.”
Usage
Context Usage
Business
Used to describe an investment, hire, or strategic decision with an overwhelmingly positive cost-benefit ratio.
Academic
Rare in formal writing. May appear in informal discussions about research methodology or obvious conclusions.
Everyday
Very common for describing simple personal choices (e.g., which product to buy, whether to accept an offer).
Technical
Not used in technical jargon. May be used meta-discursively to label a simple step in a complex process.
Examples
By CEFR Level
- The answer to the first question was a real no-brainer.
- When they offered me more money for less work, it was a no-brainer.
- Investing in that startup early on seemed like a no-brainer to everyone in the finance group.
- Given the environmental benefits and cost savings, switching to solar power is an absolute no-brainer for the council.
- The board's ratification of the merger was a foregone conclusion—a total no-brainer given the synergies involved.
- For a linguist, deconstructing the populist rhetoric in that speech was a no-brainer; the logical fallacies were blatant.
Learning
Memory Aids
Mnemonic
Think of a zombie in a movie—'no brain'—facing two doors, one marked 'safety' and one marked 'certain doom.' Even with no brain, the zombie stumbles to safety. That choice is a NO-BRAINER.
Conceptual Metaphor
THINKING IS LABOUR / DIFFICULT THINKING IS PHYSICAL EFFORT. Therefore, a decision requiring no thought requires no effort.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calques like 'без-мозгый' or 'не мозг'.
- Do not confuse with 'no-brain' (глупый человек).
- The correct conceptual equivalent is 'дело ясное' or 'очевидный выбор'.
Common Mistakes
- Using it as an adjective (*a no-brainer decision) – it's a noun. Better: 'It was a no-brainer.' or 'The decision was a no-brainer.'
- Using it to describe a person ('He's a no-brainer') – incorrect.
- Spelling as hyphenated adjective ('no-braining') – incorrect.
Practice
Quiz
In which sentence is 'no-brainer' used CORRECTLY?
FAQ
Frequently Asked Questions
No, it is an informal idiom. In formal contexts, use alternatives like 'an obvious choice', 'a clear-cut decision', or 'a foregone conclusion'.
Yes. The term refers only to decisions, situations, or tasks. Calling a person a 'no-brainer' would be incorrect and likely interpreted as insulting, implying they are stupid.
Both imply certainty and ease. 'Slam dunk' originates from basketball and often emphasizes guaranteed success. 'No-brainer' originates from the idea of not needing to think and emphasizes the obviousness of the choice itself. They are often interchangeable in casual use.
Typically, it describes a positive, easy choice. However, it can be used ironically or sarcastically to describe a catastrophically bad decision that was foolishly obvious to avoid (e.g., 'Driving on icy roads without tires was a real no-brainer').