A horribly debilitating birth defect where a person who is of very large stature has an average sized penis. The problem is that the average sized penis looks tiny compared to the persons huge body.
Girl: Damn you have a small dick
Guy: Bitch! its 8 1/2 inches long. I'm 6'8" it just looks small.
Girl: Sorry I didn't realize you were afflicted with Shaquille O'Neil Disease.
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.