ex-squared

Your first ex, in the event you've been divorced twice. This term avoids confusion, is succint, and has the added benefit of showing you have a sense of humor.

I'm on speaking terms with my ex, but if I never see my ex-squared for the rest of my life, it will be just fine.

ex-whore

a person who was formally known as a whore but changed their ways. no longer sleeps with everyone

she’s not an ex-whore she try’s to sleep with every guy in our class!

ex-twin

1) girls who became friends and then learned they have the same ex

2) girls who became friends after breaking up with a guy cheating on them

3) girls who both hate their ex (they have the same ex obviously) and bonded over that

"ally is my ex-twin and my bestie!"

ex-swap

Usually occurs between two ex couples whom the guys are bros are the girls are tight. When things turn south in both relationships, the bros and girls don't mind hooking up with the other guy/girl. Everyone benefits because both the girls and guys feel great being on the rebound while simultaneously getting revenge by hooking up with their ex's best friend.

Remember Janet and Charley used to go on double dates with Kate and Josh? Yeah well now Charley's doin Kate, and Josh is doin Janet. Classic ex-swap.

toxic ex

That one ex that you should MOST DEFINITELY not go back to.

that toxic ex just keeps coming back

Pre-ex

Pre-ex refers to your ex boyfriend/girlfriend before the break up. Many people get confused when someone refers to their ex if they are talking about before or after the break up.

If a person says, "My ex burned my house down" you wouldn't know if the ex boyfriend/girlfriend burned the house down while they were still dating and that's why they broke up or if they broke up and then the ex boyfriend/girlfriend burned the house down.

Bro 1: Bro I made out with my Pre-ex a lot.
Bro 2: Nice, so who you making out with now?

vs

Bro 1: Bro I made out with my ex a lot.
Bro 2: Nice, you getting back together?

Ex-hoe

One who was a hoe but that shit ain’t dangling anymore

Person 1: didn’t you use to fuck with...
Person 2: shhhhhhh they an ex-hoe now