A. Pointing out inaccuracies in movies, writing, games, in regard to history, physics, or accepted canonical lore.
B. As a verb (grognarding) to describe the activity of A.
A. Did you see Game of Thrones last night? It was good except middle easterners would never wield katanas, and dragons don't fly like that, sorry to be a grognard about it.
B. We tried to watch 300, but Bill kept grognarding about how the Spartan armor was more like Athenian armor.
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.