Bubba and MJ have not liked each other since they both worked at Clearchannel for two different radio stations, both with morning shows back in the 90's and early this decade. Bubba was fired from radio for things he did on-air a few years ago - google it and you can likely find out the story if you haven't heard him discuss it on air already. When Bubba was fired, MJ quickly rose to #1 in the morning show ratings and was there until about mid-year last year. MJ used to go to commercial saying "you're listening to the Arbitron rated #1 MJ Morning Show!" but does not any longer.
Last year, Bubba came back on air in the Tampa market working for Cox Radio with his one goal of getting back to #1 and knocking down MJ in the process. At some point, he called MJ's wife a derogatory name that starts with a 'w' and since then MJ has been on the offense with lawsuits. If you listen to enough Bubba, you get his side of the story that it wasn't a direct comment accusing that she sleeps with men for money, which I'm sure most people with common sense and social skills would understand. But MJ decided that his wife - who he used to call multiple times on the air weekly - is a private citizen and this was defamation. Apparently he thinks that by calling his wife that, it hurts his own character and would make people not want to listen to his show and thus he would lose money. That's part of the basis for his lawsuit. Bubba had the lawsuit posted on his website last year, so it may still be up there somewhere.
I don't know that much about the court system, but MJ filed the lawsuit over a year ago, so I'm not sure why this hasn't been resolved yet.
In my opinion, MJ's going over the top with this, but it's his only way to hit Bubba where it hurts - in the wallet. Bubba is over the top with his comments, but I do admit, I find them amusing and entertaining. Personally, I'm not sure how Bubba can be successful outside of the Tampa market with his show. It's very Tampa-based/biased. But if you enjoy it, excellent.
Hope that filled you in a bit