Purple Dragon is an alcoholic beverage made by leaching the buds, leaves, or stems of the cannabis plant (purple sticky punch) in a high-proof clear alcohol. The THC dissolves into the alcohol resulting in a dark purple liquid.
Clinton; "I didn't inhale, I just took a few shoots of purple dragon....so it doesn't count!"
A purple dragon is when you fuck a girl, and when your done with her, you wrap the condom around her neck until her face turns purple and at least one of her eyes falls out and then you skull fuck her through her eyesockets.
After Johny are done having sex with a girl he then wrapped the used condum around her neck until her face turned a shade of purple (blue is acceptable), and as soon as one of her eyes popped out, he skull banged her. Hence the purple dragon!