Have your back

Meaning

Protect or support someone.

Usage

Used to reassure allies of loyal support.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Combat metaphor about guarding a partner's vulnerable rear.

Used in military and everyday speech since the 20th century.