A disease in which your brain tells that you don't have to urinate when the bladder is indeed full. Biological Symphasis often results in peeing one's pants.
Person 1: "Dude, Jennifer just pissed her pants!!"
Person 2: "She can't help it, she has Biological Symphasis Disorder"
Person 2: "She can't help it, she has Biological Symphasis Disorder"
by CrackHead* July 25, 2009