go under the knife

phrase

informal

: have a medical operation : have surgery

I'm going under the knife tomorrow.

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go underground

go under the knife

go unheard

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Style

“Go under the knife.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/go%20under%20the%20knife. Accessed 11 Mar. 2026.

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go under the knife

phrase

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