Bruttsex Share definition Flag Bruttsex is buttsex between two males (bros) but is not gay. Bros + Buttsex =Bruttsex. Dude, lets have bruttsex, it's not gay, I promise! Bruttsex by iNsiiiiGht November 3, 2009 0 0 Get merch Get the Bruttsex mug. Buy Now — $32.95 See more merch