This is easily one of the grossest things I've ever seen, which almost helps cement the concept of a manly cake. It's a wedding cake made from meat. It's the kind of thing that you'd have to be dared to eat, knowing that it would probably be at great cost to your mental and physical health (hence manly, since women don't randomly subject themselves to these bouts of stupidity).
Seriously, that's the beauty of being a guy. You can do the dumbest thing imaginable, and it just makes you even more of a man. If I walked into work tomorrow and started eating broken glass, people would bow to me. I think this post deserves a followup on more things I deem "manly". Feel free to contribute ideas in the comments section.