go to bat against

go to bat against someone

Fig. to aid someone against someone else. I would be happy to go to bat against Dan. We refused to go to bat against one of our friends.
See also: bat, go
References in periodicals archive ?
Fox TV will have a large "The Walking Dead" zone with a baseball field where teams of fans can go to bat against zombies.
It is typically the nurses who go to bat against the doctors to say, "This med routine is not working; let's come up with something new." Nurses also monitor and, if necessary, train staff, particularly when unlicensed staff are passing meds.