In the increasingly popular fandom for BBC's Sherlock television series, Jimlock is the 'ship name' of the pairing of Sherlock Holmes and his nemesis James (Jim) Moriarty.
This pairing is particularly popular because of the rivalry between the two (in the fangirl mentality, apparently male rivalry=gay relationship), and because of the similar degrees of intelligence that the two men possess.
"Hey, you watch Sherlock? Epic! I totally ship Johnlock."
"No, that's old. Jimlock is where it's at, now."
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.