flatfyll Share definition Flag Norwegian term for the activity of starting drinking on a friday after work, then not stopping until the middle (or evening) of sunday, or as late as the work schedule demands. - Hey, i'm going on a flatfyll in the weekend. Wanna join in? flatfyll by dodraugen March 21, 2008 0 0 Get merch Get the flatfyll mug. Buy Now — $32.95 See more merch
