There is a certain kind of brand that the Texas myth has given us. We can come off as rugged people who live off the fat of the land and our only means of transportation is by horse (It's not). However with all those sentiments, whether we hold them as a defining characteristic or a stereotype that we try to avoid, we have found ourselves as sort of a way to describe a situation that is absolutely or completely insane.
According to Texas Monthly the Norwegian way of saying something is completely insane or crazy is, "det var helt texas." It roughly translates to "that was totally/completely bonkers." It describes situations, not people themselves, in which something is out of control or without rules.
The usage of Texas being used as an adjective like that stems from the myth of the Wild West and the stories and movies of cowboys living in a lawless land. Most people will think of Texas when cowboys or the Wild West is brought up.
Maybe we can all thank the likes of Spaghetti Westerns, John Ford and John Wayne for perpetuating the myth that Texas is a wild and crazy place, but maybe in a small way it's a badge of honor that we've somehow tamed this crazy patch of land.
[h/T Texas Monthly]