omutsu/ˈɒm.ɒt.suː/EtymologyBorrowed from Japanese おむつ (omutsu). Compare omorashi and other Japanese sex terms.omutsu means A diaper. Lexicurio rates it Sui generis — a strength score of 99 out of 100.nounA diaper.“I finally got some omutsu covers from Japan. I really like them. They ended up costing me $55.00 each with shipping. I bought 3. Pics follow.”