When I was first married to my husband, it was back in 1975 when the comedian Don Rickels was was sort of popular. His jokes were all about putting people down & I absolutely hated his humor......so just my luck, my husband (at the time) decided that was the kind of humor he chose to imitate. He pulled it on me a couple of times & I immediately put a stop to it.....told him that I had no intentions of living with someone who chose to treat me that way & put me down like that (I was an equal to my husband in college & my career). Every time he would pull that kind of humor & laugh at himself, I would remind him of what he was doing. It probably took about 6 months, but I finally broke him of that habit. It was one of the few things he was willing to change that caused problem in our marriage.

No one likes that kind of humor & it definitely doesn't go well in the work place......so it will definitely be better off for your BF to change his habit of using that kind of humor that really isn't even funny if he wants to be successful in his future as that type of humor definitely does drive away friends & causes problems at work as Gus pointed out.

Most times people don't even realize what they are doing with things like that or how others are reacting to it...& when changing a habit, it takes repeatedly pointing out that they are doing like I had to do with my husband....but it's something that is definitely worth your time & his in the long run.

Hope he is open to making this change.