Womens Lounger Patio Dress with Pockets Summer Robes & Sleep Shirts Plus Size House Coat at Amazon Women's Clothing store Mumu Collection Mumu ~ In the Pacific, a mumu refers to a loose, comfortable, garment worn by women. The style of the dress is typically characterized by its relaxed fit, flowing design, So why do we call this a Muumuu? Well, linguistic spread & tourism, mostly. Your granny might have worn Muumuus as they were popularized in the US as house dresses, maternity wear & nightgowns, but Can one truly be an old hag without owning at least one muumuu? : r oldhagfashion