back (someone) for (something)(redirected from back one for)
back (someone) for (something)
To support someone in some pursuit, often election to an office. I'm backing Caroline for student council president—here, have a button!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
back someone for something
to support or endorse someone for something, such as a public office. We all back Tom for president. I am backing Jane for treasurer.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.