Eggdrop Soup Share definition Flag A dish consisting of a woman's menstrual blood. The name comes from the fact that the woman is 'dropping eggs' at the time. Dude, Peter's fucking sick. He drank up Donna's eggdrop soup like it was no big deal. Eggdrop Soup by RobotKeaton May 14, 2009 0 0 Get merch Get the Eggdrop Soup mug. Buy Now — $32.95 See more merch