I don't think J.D. bought into the hype about him from his dad post-divorce. That trust in his dad's opinion looked severed, as well as with Coach. (Though we never really got to see much of J.D.'s relationship with his dad after that divorce so it's pretty speculative at that point). After that it seems completely…

I think they think that it's a pejorative. Of course we're on the euphemism cycle at that point.