As coined by the "Nostalgia Critic" -- The culmination of all cuss words combined in result from an impalpable rage via watching the cespool backwash of cinema. This modern phoneme can only be used correctly as an adjective unless you want to sound like an ass-hat.
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.