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!
An Act of homosexualintercourse. It involving to males in which they both retreat their foreskin and press their glans together. Then, the first male rolls up his foreskin on both of their glands. Finally, the second male rolls his foreskin over the other males one.
We couldn't separate our dicks after the salami overlap
or
My cock and bolex ripped open when I fell backwards while salami overlapping!