Go off half-cocked

Nguồn tin: nguontinviet.com

If you go off half-cocked, you take a rash action without being prepared for the consequences. It refers to an old fashioned single action revolver, which had a half-cock position in the action where it would supposedly not fire. If you made a mistake and it was at full cock, you would fire prematurely, possibly with devastating results.

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Posted in: Idioms