swear on one's mother's grave
idiom
—used to stress that one is being absolutely honest
I didn't do anything wrong. I swear (on my mother's grave).
Dictionary Entries Near swear on one's mother's grave
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“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 31 Oct. 2024.
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