go to bat

Verb

 * 1)  To be the individual or team that is currently batting; play offense.
 * 2)  To be aggressive, to be assertive, to actively pursue a goal or action.
 * 3)  To champion, to actively assist, to provide support (for someone).
 * 1)  To be aggressive, to be assertive, to actively pursue a goal or action.
 * 2)  To champion, to actively assist, to provide support (for someone).
 * 1)  To champion, to actively assist, to provide support (for someone).
 * 1)  To champion, to actively assist, to provide support (for someone).