The act of leaving a poop stain around someones mouth after eating out someone's buttocks.
Does Gerald have a mustache or is that a dirty mayfield I can't tell.
by ThermanDynamics March 26, 2022
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The sexual act where a man coats his dick with grape kool-aid powder, and commences to have sex with his female partner. Then drinks the combination of semen, Kool-aid, and vaginal liquids, known as "dirty mayfield."
Logan: I totally gave Montana the Dirty Mayfield last night!! YEAA!!

Tony & Keith: Dude, that's fucking gross.
by KiKicurly October 8, 2010
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