It's a term usally said with anger and rancor, wich refers to God and his triple nature of chameleon, wolf and snake. It goes along with dioporco e porcodio.
*Guy trips over and spills your drink*
You: Dio camalupente! Che cazzo fai?
An esclamation used in Tuscany when you are playing briscola and your teammate has to play an ace or a three of briscola, even if he doesn't have one. It can be accompanied by swear or offense toward anything that is sacred. Very effective if your teammate actually has an ace or a three.
Troncaci!
Troncaci diocane! (more enphasis)