Short for "Vaginal Ulcer." A vicious disease caused by too much sex. A rupturing of the vaginal wall, which may lead to a channel developing between the vagina and the anus so that when one defecates, the fecal matter travels through the vaginal canal as well as the rectum. Painful infections may develop, along with copious amounts of pus.
All the porn stars have vulcers.
My friend has been banging too much recently and developed a vulcer.