"I was engaging in copulation the night previously, when my dearest partner of my non-marital relationship released an expulsion of air, a Flatus Vaginalis my dear boy, from her Vulva."
A chronic diseased suffered by men who are pussies. This condition is characterized by build up of sand in the vagina which causes extreme irritability, pussy behavior, and generally acting like a whiny tool. Easily cured with a saline flush, or a bitch slap.