People who are ilke Grammar Nazis when it comes to the use of fallacies in a argument. Basically these people are usually in the Facebook comments and in Reddit threads. Also Fallacy Nazis are mostly left wing or factcheckers.
I hate fallacy nazis! They think that the facebook comment section is a some sort of a debate center and they're pointing out the fallacies of people.
Its a insult for the left leaning people who make memes about the left. The insult is mostly used by the alt-right, /pol/acks or simply people who hate the left.
Kek the left try to meme Bernie Sanders into presidency. We all know that the Left can't meme.
A politician that has a lot of support from memers (ex. people from 4chan) in which even though the politician is delusional or unrealistic policies and is controversial.
A good example of this is Donald J. Trump in which he was supported by people from /pol/ and the alt-right and make memes to promote him.
"We have voted a meme candidate as a president" said a /pol/ack on the 4chan board /pol/.