When you are wiping your ass and your finger slips off the paper causing you to scrap your fingernail against your asshole. - hence the name brown nailing
Person 1: hey bro what took you so long in there?
Person 2: ya my bad dawg, I was brown nailing pretty hard so...
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.