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Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary 
	
		  half cocked   
  ˌhalf ˈcocked BrE  AmE  (also ˌhalf ˈcock British English)   [Date: 1800-1900; Origin: cock 'to get a gun ready to fire']    go off half cocked (also go off at half cock British English) to do something without enough thought or preparation, so that it is not successful
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