when you are doing a girl up the butt, and then you grab her hair, and whisper into her ear "I have AIDS", and see how long you can hold on.
"what's a montana rodeo?"
"what i did with your mom last night, it took her like 15 seconds to get me off of her."
by dcopp October 09, 2007
Requires three guys. One guy is on his hands and knees with another guy sitting on his back. The third guy tries to throw him off by violently penetrating the first guy.
Greg was always the bronco at the Montana Rodeo.
by greggy Henderson November 14, 2008

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