Eek, a Penis!

"Eek, a Penis!" is the fifth episode in the twelfth season of the American animated sitcom South Park. The 172nd episode of the series overall, it originally aired on Comedy Central in the United States on April 9, 2008. In the episode, Mrs. Garrison seeks to become a man again through the help of a new medical procedure. The subplot focuses on Cartman's attempt to teach struggling inner-city school children how to succeed by cheating. This plot is a parody of the 1988 film Stand and Deliver, with Eric Cartman playing a role similar to that of Jaime Escalante. The episode was rated TV-MA L for strong language in the United States.

The episode was written and directed by series co-creator Trey Parker and co-written by series co-creator Matt Stone.