Octofuck Share definition Flag The act of having sex with 8 partners at the same time; usually a gay train. Guy: Oh my God, I'm so sore from last night's OctofuckGuy 2: Thanks for inviting me, dick. Octofuck by iC4l April 2, 2011 0 0 Get merch Get the Octofuck mug. Buy Now — $32.95 See more merch