Wikipedia seems to do a decent enough job defining it:

Authoritarianism is a political system characterized by the rejection of political plurality, the use of strong central power to preserve the political status quo, and reductions in democracy, separation of powers, civil liberties, and the rule of law.

But basically, my point is:

• If your government represents the people, then it is possible for your people to elect authoritarianism, especially if they are unhappy, like the meme describes, and/or when there’s foreign nations trying to destabilize the system.
• If your government does not represent the people, then it is likely to devolve into authoritarianism on its own, because individuals or individual groups will want to assume all power and limit the rights of others.

Basically, my opinion is that politics is a constant work in progress, no matter the political system.