yiffmas Share definition Flag yiffmas is a day where furries disgrace the world in spectacular fashion. Doing all the weird shit everyone knows they do, but they never admit to. Furry: merry yiffmas! Normal human being: please, just leave me the fuck alone yiffmas by Eeeeeee! December 24, 2020 0 0 Get merch Get the yiffmas mug. Buy Now — $32.95 See more merch
