Personally, I never liked the term "codie" or "co-dependent," but that's just me. I do recognize that's it a shorthand term for a collection of behaviors that often accompany being in a relationship of any kind with an alcoholic or addict.
It's hard for me to explain why it bothers me--I suppose it's the implication (for me) that it's an innate personality trait rather than a coping mechanism for trying to live with insane behavior. We get gaslighted enough and we stop knowing what's real.
It's not a big deal, I'm not terribly offended by it, just don't use it, myself.