Came into conflict with the other Gods by refusing to share her private swimming pool. APSU got sent to sleep in the deep, but poor old MUMMU was tethered poolside by a string through his nose, and has kept mum ever since, keeping the pool spotless.
GodNote: Sorry this Mummu article is a bit short. We have sent our Data Dwarves off to find more nuggets of information. Updates coming soon.