Siete Pilas Share definition Flag Spanish slang for Black Dick. In reference to the length of 7 D cell batteries lined up in a row. "Hey Becky, Check out the Siete Pilas on that African American fellow." Siete Pilas by LaBurger March 4, 2012 0 0 Get merch Get the Siete Pilas mug. Buy Now — $32.95 See more merch