1. An expression used out of frustration and seeing no clear solution to a problem.

2. An expression of disbelief.
1. Tom: "That stripper you banged in the casino elevator that one night says she might be pregnant."

Joe: "What!? Not again! Lord have mercy..."

2. Jane: "I was so drunk that night, I wish I could remember the guy who banged me in the elevator. Im gonna get a paternity test and whoever he was is gonna be paying A LOT of child support."

Joe: "Lord have mercy..."
by JeezusKriestSooperstarr669 November 15, 2013
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When you are overly stressed but don't want to use God's name in vein.
Mom: can you do this, this, this, and that before I come down stairs?

Me: Uhh, Lord have mercy on my soul, I guess so.
by babygirlrhi June 11, 2019
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Used to describe extreme disbelief or shock, basically saying "Bless those bastards/that situation."
"I walk with three kids that can't wait to meet God

lately, that's Bucktooth, Mohamed and Crybaby,

what they do everyday just to eat lord ha' mercy,

strapped with an AK and they blood thirsty..." - K'naan, What's Hardcore
by KD42 March 11, 2011
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