uterroar Posted in U Best definition uterroar The first day of a girl’s period, when her cramps are so bad that her uterus growls. Similar to when a person’s stomach growls, but in the uterus and more angry. Baby, did you just hear that uterroar? How satisfied are you with the definition? Looking for uterroar meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 48 times.