Typically performed by someone who is not loyal. They will constantly move around looking for the 'next best thing'.

If you date an overlapper, you need to constant look over your shoulder. It doesn't matter how much you tell them that you love them, they will immediately and without warning start dating someone else. If they are a coward, they will break up with you and give you a completely different reason for the break up (e.g. they will lie and not admit they are breaking up because they found someone else). If they are particularly selfish, they will deny you had a relationship at all.
Steve: So I was just a victim of overlapping!
Joe: She did the same thing to me, why are you surprised? Every relationship of hers ends with overlapping.

Steve: But, I thought I was special.
Joe: Yeah, she makes everyone feel that way, until she flushes you down the toilet, and moves onto the next best thing.
by ChodeYourself December 20, 2015
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NOT cheating, technically. When you start dating someone new before you've actually splitsville with your old significant other.
I'm overlapping with Terry because we hooked up and I haven't dropped Jenna yet.
by IzzyMargoStevens February 16, 2006
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To occupy the same area or have something in common. It doesn't really have another definition, but fools laugh when they hear the word.
"bro, did you hear that prof, he just said the word OVERLAP!"
"nah bro, why is that funny?"
"bro, it's funny because I'm a total FOOL!"
by priffityprof November 15, 2017
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When one is in a relationship that both people know is ending and one of the two people starts to look for another relationship. This could be described as cheating but is usually not recognized as such as both people know that the end of the current relationship is emminent.
"Did I see you with Carrie yesterday?"
"Yup"
"Dude, I thought you were still dating Melissa?"
"I am but it's pretty much over and I'm overlapping"
by rktekt July 21, 2006
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noun - the occurance of dating two people at one time, when one relationship is ending and anther is beginning.

verb - to have two dating relationships that are beginning and ending concurrently.
1. Did you date Peter and Jon at the same time?

Not really. It was an overlap.

2. Peter and I broke up after I met Jon. He was my overlap.

3. You dated a girl named SherriLynne?
NO, i dated two girls, Sherri and Lynne. It was an overlap.
by jerseygirl219 May 25, 2007
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When two people have hooked up with at least one person in common, usually used when the number is a lot more.
Thaddeus: Bro, I finally got to fuck Jocinda last night!

Tyrel: That's not coo Thad. We have too much overlap already!

Thaddeus: Come on man. Eunjeung, Latoya, and Ana...so with Jocinda that's 4. You're just jealous that you couldn't get it up and she never came back.

Tyrel: Fuck you man, what about Puja and Juana? That's 6 hoes dude. That's too much.

Thaddeus: Oh shit, you're right man. Too much fuckin' overlap. We gotta stop.
by overlapp3d October 19, 2012
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An Act of homosexual intercourse. 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!
by peppolla October 14, 2009
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