Have you had an Ex? I can tell you that is someone with whom a person was once associated, in a relationship, marriage
I have had an ex.  she was crazy!  Have you?
Ex (relationship)
In social relationships, an ex (plural is exes) is someone with whom a person was once associated, in a relationship or marriage. As a prefix, "ex-" can refer to a variety of different relationships; for example, one might refer to a music group's "ex-guitarist", or someone's "ex-friend". 
When used alone, "ex" as a noun is assumed to refer to a former sexual or romantic partner, especially a former
have been times when we've been rude, I'd be crazy not to admit that. ... But this was an interview we never thought twice about."
Russo said to New York "Daily News" media columnist Bob Raissman,
"Do I wish right this second I had a better relationship with Cory Lidle? Yeah, I absolutely do, (but) you got to do what you got to do. I don't know what to tell you. You can make the argument that I look like