when you are fucking a girl doggystle and then you grab her hair and tell her you have aids or something else that would make her try to get away and you see how long you can continue to "ride her"
"i pulled a bucking bronco on that girl i met at the bar yesterday."
by lil' smokey March 8, 2007
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Sex move in which the girl has pigtails, and you have doggy style sex, then at the peek of the male's orgasm, he whispers into the girls ear, "I have aids" then the male sees how long he can keep it inside.

WARNING DO NOT ATTEMPT, THIS IS A JOKE, IT CAN CAUSE PSYCHOLOGICAL DAMAGE AND OR HAVING YOUR DICK SNAPPED OFF.
No example cuz you shouldn't try the Bucking Bronco if you would like to keep your dick attached to your body
by SAM P AND ZACH K March 5, 2008
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During sex, the male is on the female can be many different positions, and while he's in her, he holds her hands/arms/or anything else to keep her down while he's busy fucking her, then says something like: "I have AIDS," or "your best friend was better," etc. She then tries to get away as fast as she can. As the female is trying to get away, her frantic movement is making his dick go deeper inside her, at a faster rate.
"Last night I tried the whole 'Bucking Bronco' thaang with my lady. I know that's terrible...but, DAMN! It felt so good."
by [SALTY!] Pirate June 6, 2006
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it's when you are doing it doggy style and your friends are hiding in the closet...they jump out and yell "SURPRISE!!" and you have to hold on and stay in her for 8 seconds
"Biff and Brad are coming over and we're going to pull the Bucking Bronco on Amy...it'll be hillaaarious, I'll say I didn't know-she won't believe me-and then I won't have the awkwardness of breaking up with her! Perfect plan!"
by Rumford February 8, 2014
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Similar to other definitions, the bucking bronco is when you are fucking your girl doggy style, you then make a smart comment(ex. "I have AIDS" or "Your sister was better" and see how long you can stay on for.
You are banging a random chick you met that night, doggy style. While it's all goin on you whisper in her ear,"I have AIDS," then let the ride begin and see how long you can stay on that bucking bronco for.
by Erik June 18, 2006
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during unprotected sex in the doggystyle position,
hold on extremely tight and calmly whisper in the girls ear
that you have aids,brace yourself and enjoy the ride!
"i was fuking sally and i gave her the bucking bronco"
by xrsize May 15, 2008
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The new, upcoming trend brought on by the younger generation. It involves one male thrusting a random male to the ground, then jumping on him and doing it from the back very quickly, until the other person fights back.
Jonah was filming me as I gave Trevor a Bucking Bronco.
by Dantechunkers March 7, 2012
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