watch someone's back

idiom
variants: or have someone's back

Definition of watch someone's back

: to protect someone who is doing something that is dangerous or risky A police officer always watches his partner's back.

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Cite this Entry

“Watch someone's back.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watch%20someone%27s%20back. Accessed 2 Dec. 2020.

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