swear on one's mother's grave

idiom

Definition of swear on one's mother's grave

used to stress that one is being absolutely honest I didn't do anything wrong. I swear (on my mother's grave).

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swear in

swear on one's mother's grave

swear on the Bible

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Cite this Entry

“Swear on one's mother's grave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/swear%20on%20one%27s%20mother%27s%20grave. Accessed 27 Sep. 2021.

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