Prolonged leaning forward on the elbows whilst engaging in iPhone gaming during the act of having a particularly tricky bowel movement. With the result of leaving a prominent red mark on the thigh saluting your efforts.
After a heavy drinking session on the Guinness, I was birthing a beast from my ass whilst trying to beat that tricky level on Angry Birds and it left me with serious Shitters Knee.
by DeNinjabreadman December 26, 2011