• no brainer,nobrainer

Fromno +‎brain +‎-er.

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no-brainer (pluralno-brainers)

1. (informal) Aneasy orobviousconclusion,decision,solution,task, etc.; something requiring little or nothought.

   If the newer version performs as well for half the cost, the decision is ano-brainer.

   • 2019 November 20, Graeme Pickering, “Plans breathing new life into Fife”, inRail, page49:

     "Babcock [an engineering services company with a facility atRosyth] has new contracts for new frigates there, so opening up the opportunities for rail running in is ano-brainer."

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