A Syngyn is another word for man whore. If you are called a Syngyn it might mean you date many girls and break many hearts. When you get a Syngyn they are great to have until a Syngyn tries to hurt you. Syngyns are very rude and are not good creatures. Syngyns may have blue eyes and wavy dirty or light brown hair and only has one ear.
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.