误打误撞

Explanation: Means without prior careful consideration. 　　Source: Yuan Guan Hanqing "double dream to go to the" second fold [sheep Off] Fu board commercial building, fishing, ginger Lvwang children, moved the two kings of good dreams, it dreams to be the first prophet, minister is wrong play false hit. " 　　Examples: Very hot ~ but the met laughed, and said some things down but did not. "★ Qing Cao Xueqin's" Dream of Red Mansions "sixty-back