The proper nomenclature is "sanitary napkins". Rags is just so... crude.
Islander fans started calling us that in the '90s as a derogatory term. That's where it originates. I brought it up to one of the admins how maybe we can change any shortening of a name to the proper name like ***** instead of a curse. ie. Sens to Senators, Laughs to Leafs, Rags to Rangers, Pens to Penguins, Piles/Isles to Islanders, etc.