“I lay there," she wrote, "annoyed that I was getting fucked by a guy with Yeti pubes and a mushroom dick like the character in Mario Kart." -Stormy Daniels
A condition in which the corona and frenulum of the penis (the "mushroom"-esque part) are significantly wider than the shaft. Sometimes a result of poor circumcision.
either a circumcised penis, or a non-circumcised penis in which the foreskin is always kept pulled back
I'm so glad I'm not circumcised, that means I get to keep my my foreskin pulled back from the mushroom part of my mushroom dick thus avoiding "dick cheese", then push it back over whenever I want, and STILL not have any fucked-up cosmetic surgery on my cock