Boise State Bronco Share definition Flag When a girl rides you for more than 3 hours, your penis turns a bluish purple color with a raw sensation. She rode me so good she gave me a Boise State Bronco. Boise State Bronco by Taint Anus November 15, 2015 0 0 Get merch Get the Boise State Bronco mug. Buy Now — $32.95 See more merch