When the entire body goes numb and the penis loses circulation. Often caused by mass masturbation, a quad relapse is a sign of your blood flow slowing down and stopping. Symptoms of a quad relapse: numb penis, numb legs, numb arms, ringing in the ears, blood flowing out the penis or the eyes.
(A) Fuck man.... I just quad relapsed
(B) get fucked little pussy
(A) I hope your family burns in the pit of hell along with hitler