no-brainer

Definition

An easy or obvious conclusion, decision, solution, task, etc.; something requiring little or no thought.

Etymology

From no + brain + -er.

Example Sentences

• "If the newer version performs as well for half the cost, the decision is a no-brainer."
• ""Babcock [an engineering services company with a facility at Rosyth] has new contracts for new frigates there, so opening up the opportunities for rail running in is a no-brainer.""