go to bat for somebody
go to bat for (one)
To act in support of one. Since you know the recruiter, do you think you can go to bat for me? I really need this job.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
go to ˈbat for somebody(American English, informal) give somebody help and support: Nursing students are going to go to bat for the homeless.
Farlex Partner Idioms Dictionary © Farlex 2017