Noun
a mass attack of troops without concern for casualties; originated by Japanese who accompanied it with yells of `banzai'
Source: WordNetAlthough Kuribayashi had forbidden the suicide charges familiar with other battles in the Pacific, the commander of the area decided on a banzai charge with the optimistic goal of recapturing Mount Suribachi. Source: Internet
The old " banzai charge " attack was also discontinued as being both wasteful of men and ineffective. Source: Internet