monthly friend

plural monthly friends

1. euphemisticslangThe menstrual period.

   "Office sex; I've never done it, but Kat tells me it's amazing. We'll have to try it once my monthly friend leaves."

   2014, Kelly Collins, Brownie Points, IndieWrites, Inc., →ISBN

   2 more examples

   Experiencing the visit of my monthly friend at work, I trudged out into the kiln today, across the car park to the little shop in search of some tampons.

   2011, Becky Wicks, Burqalicious: The Dubai Diaries: A True Story of Sun, Sand, Sex and Secrecy, Skyhorse Publishing, published 2012, →ISBN, page 26

   “That's what you're trying to do. You're trying to get pregnant!” “I'm not! If it happens, I'll be glad. If not...” “You're disappointed every time your monthly friend comes to visit. Will anyone else be glad if you got pregnant?”

   2014, Holly Kerr, Coming Home, Etopia Press, →ISBN