1 definition by PerkinsHadSexWithFiala

The act of vigorously fucking the empty sleeve of one's winter coat, often leather. In the act of Armless Horsemaning the person usually ejaculates into the sleeve of said winter coat.
My roommate just did The Armless Horseman into my new leather jacket!
by PerkinsHadSexWithFiala December 15, 2010
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