noun
random shooting; shooting blindly
Literally 'blind shooting'; firing a gun without aiming, or figuratively doing something haphazardly. The term めくら is now often avoided due to its derogatory connotation, but this compound persists in certain contexts.
犯人は群衆に向かって盲撃ちを始めた。
The criminal started shooting blindly into the crowd.
彼のやり方はまるで盲撃
His method is just like shooting in the dark.
乱射 means 'random shooting' or 'firing wildly' without the literal 'blind' component, and is more common in news reports. 盲撃ち emphasizes the lack of aim or haphazardness.
Compound of 盲 (めくら, 'blindness') and 撃ち (うち, 'shooting'), the continuative form of 撃つ (うつ, 'to shoot'). The exact origin is uncertain, but it likely arose as a vivid metaphor for shooting without aiming.