go off half-cocked

Definition

To take a premature or ill-considered action.

Etymology

From the days of flintlock and caplock firearms, where the half-cock position of the hammer was both a rudimentary safety, and the proper position for priming the pan or inserting a percussion cap. The phrase was originally rendered, "to go off at half-cock."

Example Sentences

• "Make sure none of your men go off half-cocked and ruin this operation."