In the context of the Italian political system, that would mean that whoever gets a relative majority - as low as it may be - forms a powerful government that cannot be removed from power for the whole of the term, during which it can do as it pleases as opposition is functionally useless.
Now that may not be a dictionary definition of fascism, but surely it’s a shiv in the neck of democracy and a pretty big step towards dictatorship.
The good thing is that it requires citizens to vote for it in a referendum.
The bad thing is that all it requires is to swindle people, which seems to be pretty easy nowadays considering that all referendums in Italy have had the worst possible result for the last 20 years or so.