Festivus opening Share definition Flag An act of closeted homosexual relations between a scruffy straight man and a metrosexual in denial. I should not have gotten into that festivus opening last, I will be sore for days and I can't, nay won't, wear sweatpants. Festivus opening by Patty90 March 27, 2016 0 0 Get merch Get the Festivus opening mug. Buy Now — $32.95 See more merch