Geronimo

Interjection

 * 1) A cry generally said before jumping out of or into something.

Thesaurus
bugle call, call to arms, call-up, catchword, clarion, clarion call, conscription, exhortation, go for broke, gung ho, levy, mobilization, muster, rally, rallying cry, rebel yell, recruitment, slogan, trumpet call, war cry, war whoop, watchword