8long Share definition Flag a word to describe your penis. a very long one. especially when it is 8 inches long. Girlfriend: Damn boy! You gotta big ass dick. Boyfriend: Yeah bitch. Its 8long in yo' throat 8long by LukeDizzleSon November 22, 2011 0 0 Get merch Get the 8long mug. Buy Now — $32.95 See more merch