have one's back to the wall
one's support or second in a fight. (From back-up.) : I need a back I can depend on.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
Cite This Source
More from Dictionary.com Translator
Dictionary.com Word FAQs
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.
Word Dynamo By Dictionary.com