It's the reverse cowgirl position but two lesbians, where the one with a strap-on is on the top. (Thus "broken", because natural erect penises dont bend like that)

It's referenced a couple of times in House M.D.
House: "Hey Wilson, are you going to do the Broken Cowboy?"

Or...

Foreman: "Do you know what is a broken cowboy? It was on House's bachelor party requirements list... ... I hope she can do the broken cowboy"
by Dyke Biatch March 25, 2022
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The act of sex where two females simulate (or through strap-on, act on) the traditional "cowgirl position." Also could be linked to "reverse broken cowboy."
I was at a bachelor party last night with two strippers and they preformed the broken cowboy.

My lesbian girlfriend broke out the strap-on last night, and I rode her like a broken cowboy.
by cegarat April 29, 2009
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