Brown Friday Share definition Flag The day after Thanksgiving when the toilets begin to clog up with post-celebratory waste Scrubs: "Hey man, wanna hangout?" Cubbiss: "No man, I'm spending my Brown Friday on the toilet." Brown Friday by package2700 January 22, 2010 0 0 Get merch Get the Brown Friday mug. Buy Now — $32.95 See more merch