brainer
n. countablen. a choice or decision that is so easy you do not even have to think about it. You use this when the right answer is very obvious.
n. an easy or obvious decision that requires little to no mental effort. Informal in register; typically used in the phrase 'a no-brainer'.
Taking the job with a higher salary was a total brainer.
With a fifty percent discount on the table, choosing that laptop was a complete no-brainer for me.
While some critics argued over the technical specifications, most consumers found the upgraded model to be a no-brainer given its significantly lower price point and improved battery life.
Almost exclusively used in the idiomatic compound 'no-brainer'.
It was a no brainer decision.It was a no-brainer.The word is usually used as a noun on its own rather than as an adjective modifying another noun.