A bode is when a man's balls are bigger than his erect penis. This can refer to a small bode, where his penis is just really small and his balls are averaged size, or a big bode where the balls are huge and the penis is normal to big sized. The word itself is a refrence to "it doesn't bode well" ie. the fact that he has a bode is not a good thing.
Look at that bode, I've never seen balls that big!