supercock

plural supercocks

1. slangvulgarA large penis.

   I would say that a thickness of 2 ins diameter and a length of 11 ins would count as a supercock.

   1973, Penthouse Magazine, Volume 8, Issues 1-6 (link)

   1 more example

   The problem with the argument about the absentee daddy is that in order to buy into it, you have to believe that black women are dumb as rocks, […] and that the black supercock is a mystical one-eyed wonderweasel that mesmerizes and hypnotizes defenseless young black girls […]

   2010, Jim Izrael, The Denzel Principle: Why Black Women Can't Find Good Black Men, St. Martin's Press, →ISBN, page 140

2. PhilippinesdatedA formidable gamecock.

   […] You know, I could understand your anxiety if you were betting on just any rooster. But when you wager on a supercock like this, why, it's just like putting your money on San Miguel."

   1959, Alejandro Roces, Of Cocks and Kites, and Other Short Stories, Regal Publishing Co, published 1959, page 61