Refering to the chemical Taurine (bull testosterone.), in most of energy drinks (like Red Bull, Bull?! ehh ehh), but mostly refering to Monster energy drink.
"You gonna pop open that bullnut, or waaat man?!"

"Can we drop by tha 7-11 to get some bullnut?"

"Duuuuude, im so tired, i think i need myself a bullnut!"
by Garbo Boyz April 8, 2006
Get the bullnut mug.
you should stop talking all that bullnuts about how your team is the best.
by KRHimself November 10, 2004
Get the bullnuts mug.