What is the meaning of Banzai?

Thrill-seeking; wild.

A cry or cheer of enthusiasm, or to celebrate victory.

A cry or cheer of "banzai", to express enthusiasm or celebrate victory.

Clipping of banzai charge.

To carry out a banzai charge (against).

a cry or cheer of "banzai", to express enthusiasm or celebrate victory

Rōmaji transcription of ばんざい

Source: wiktionary.org