Dirty Millie Share definition Flag When you take someone upstairs at 5am and shag them LOUDLY with a house full of people! I pulled a dirty millie on New Year’s Eve and now I regret it Dirty Millie by Bigbattysecrets April 16, 2020 0 0 Get merch Get the Dirty Millie mug. Buy Now — $32.95 See more merch