It all started with D'Cayn Rottagen, Nobody, and Nilat...
These fearsome warriors of Nurgle would chant WeeYoo to locate one other in the woods at campouts and battles, without the enemy knowing what was what. Over time, other lady Nurglings began to join in. Eventually, all the ladies of Nurgle, would chant WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo, WeeYoo for as long and as loud as they could. Thus began the Society of the WeeYoo.