The act of ejaculating on a woman's back while sleeping, and in the morning she smells and eats it, usually the semen have a sour taste.
"She wouldn't give me anal last night, so I left her a little Sour Horse Milk"
by Titty twister69 November 3, 2015
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When you accidentally show up to the wrong place.
"Hey man you almost here?"

"Nah man I milk horsed it I'll be there in 5"
by Chadsdong November 5, 2017
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