Crazy Evil!
Having to do with a person whose actions imply insanity and deviant/devilish harm
My boss is creevil. He starts ranting about random things before noon, screams personal insults at us in front of co-workers and makes a point of firing people during the Holidays.
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.