The bronco is a sexual encounter that involves a guy, his girl and all of his buddies. Before the encounter, 4-8 of the buddies hide in closets and other places in the room the encounter will occur. The couple enter the room and go at it. When the girl is on top, all of the buddies jump out, turn the lights on, and start cheering like it's a rodeo. The object is to get her to stay on for 8 seconds.
That bronco you pulled last night was the most fucked up thing I've ever seen!
You start by going doggy style and then just when she is really enjoying it, you grab her tits as tight as possible and yell another girls name. This gives you the feeling of riding a wild bronco as she desperately tries to buck you off.
Sex act. When doing it doggie style, you reach around and grab the girls tits and say something to piss her off ("wow, your tits feel just like your sister's..." "oh god, mary... (when her name is jane)" "damn, your loose, who'd you fuck now?" etc.) and try to hold on as long as you can.
I pulled a rodeo with amy last night, I was only on for 2.7 seconds. she's strong when she wants to be.