Perhaps it's because I've just watched The Big Short, but I'm bearish on Italian Government bonds right now.
How would I go about shorting government bonds?
If you had access to a broker that allows you to trade on Eurex, you could short euro-BTP futures, which are Italian treasury bond futures. However, if you're in the US, finding such a broker would be difficult and probably not worth the expense. If you're in Canada or another country that allows CFDs, there may be brokerages that let you trade euro-BTP CFDs.