[Idiom] Salute someone's old flag

[Chicken Sandwich]

There's maybe 11 women in this city who haven't saluted his old flag.

This is a quote from Two and a half men. I'm getting the impression that it means the same as

There's maybe 11 women in this city who haven't had sex with him.

Am I right? Is this an idiomatic expression? It certainly doesn't seem to be common because I couldn't find it in the dictionaries I own.

Thanks

 

[SoothingDave]

No, it's not an idiom.

 

[Tdol]

It could have that meaning in the context, but as SoothingDave says, it's not an idiom. UrnamDictionary does give a sexual definition for salute.