A term used to describe any country music that is liked by someone who is not a 'country music fan'. It usually means that they like country music when it is performed by certain bands that have been blessed as cool by the hipster community.
I hate country music.
But you like that Loretta Lynn song covered by Neko Case, that's country music.
No, that's sung by Neko Case, so that makes it alt country. See how it works???
No, actually, I don't.