Someone who is always in a relationship. They can't stand being alone so they have the next person lined up before breaking up with their current fling.
Dang! Jason just broke up with Lilly a minute ago and is already out with his new girlfriend, Amy. Oh you KNOW he's an overlapper!
used to describe a hit song that is played on the radio (in stores, on the internet, on iTunes, at parties, etc.) numerous times to the point of annoyance.