A knuckle-dragging dipshit who thinks the answer to every social problem is extreme violence, possessed of an extreme authoritarian bent due to long-term exposure to tribalistic online echo chambers, and generally has the psychology of an extreme reactionary. Does not have to be right-wing or fascist, in fact many medievalists are rabid SJWs.
Matt: Hey, Brad. Did you hear about that dumbbint on Twitter who said she didn't care about male victims of false accusations because she felt women had it worse?
Brad: Yep, just another medievalist victicrat.
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.