an idiot or extremely stupid person. origianlly used by the employees of Home Depot when talking about an item that was half-priced due to damage of said item.
Billy: dude, i got a 45 on my history test! haha!

Joe: Billy, you are such a markdown
by Antonia!!! September 9, 2008
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An attempt to get into a girls pants by discounting their car insurance.
Maya: "You did me a solid with that , uh, Maya markdown on my insurance."
Jake: "No. Really. There are no markdowns, just great rates"
Maya: "Pull around back in twenty minutes. I'll hook you up with the good parts."
Jake: "When you want the real deal....."
by feed the dogs January 4, 2021
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