Statists

Not to be confused with sadists or satanists (though few libertarians would complain if you did), statist is a piece of invective used by ancaps to describe people who approve of the existence of governments.

What is Statism?
At first glance, it's exactly what it sounds like: just thinking states are a good idea. But the way it's often used has the implication that it's a mirror image of ancap libertarianism: where libertarians want to shrink or eliminate the government as an end in itself, statists would want to expand the government's power for its own sake. So someone who's arguing for government intervention into the medical or telecom industries isn't doing so because they want to help people or don't like specific aspects of the way those industries are run, they're doing it because they're Statists and want the government to take control of people's lives.

Do Statists Exist?
Well, no. People who like having a government like it because it increases the overall happiness of society or because you need one to fulfill the Difference Principle or because they just like having public roads and botulism-free food. The closest political philosophy to "statism" would probably be that of Thomas Hobbes, and while he's a very famous and widely taught philosopher, it's mostly because of his influence on later writers like Locke than because anyone actually endorses the society laid out in Leviathan. (Although there is, oddly enough, an argument to be made for a connection between libertarians and Hobbes.)