Incredibuttsex Share definition Flag The legit best anal sex you can have. "Dude last night I had incredibuttsex. With who bro? That chick from That Bar? Hell yah!" Incredibuttsex by LiamDaPimpMotherfucker September 28, 2011 0 0 Get merch Get the Incredibuttsex mug. Buy Now — $32.95 See more merch