Also found in: Dictionary, Thesaurus, Financial, Wikipedia.
A very easy or obvious choice, decision, or solution. (So easy or obvious that it is humorously said to require no brain.) The military said they would pay off my student debt and provide a guaranteed job after I completed four years of service, so it was a no-brainer for me. The answer to the riddle was a total no-brainer—I don't know why it took me so long to figure out!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. an easy question that takes no thinking to answer; a simple problem that requires no intellect to solve; a dilemma that requires no pondering to resolve. His proposal of marriage was a no-brainer. She turned him down flat on the spot.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
Something obvious, requiring little thought. Dating from about 1970, the term quickly caught on and is on its way to clichédom. The Washington Post had it on October 3, 1991: “The rich guy is willing . . . This is a nobrainer. Let him build it.” See also rocket scientist, you don't have to be a.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer