When I began this pool journey of mine a few years ago, I would search the internet for sites that were pool related, and eventually I found AZB. I had no intention of jumping in and participating at the time, but I got tired of having to answer the question in order to use the search function, so I decided to create a login name.
I didn't put a lot of thought into it (obviously) and simply needed something to use. Regionally here, we use the term or phrase "dubbing around" as doing something not terribly well or seriously, and a "dub" would be that someone. As I was literally brand new to the game, and had nothing to add to the forum, I decided on Justadub. Never imagining that I would become so addicted and involved with the sight. Had I realized that, I probably would have taken more time in choosing a user name. I expect that I will eventually ask the powers that be to change it to some variation of my real name, Bruce.
As for the avatar, that is a result of the op, Mr.Chicken, posting a suggestion here that after all the time and posts that I had made, I should have an avatar. I'm from Maine, so whenever the conversation led to visiting here, pretty much everyone would mention lobster. And around that time, JAM and I had been bantering (good naturedly) about the proliferation of avatars with scantily clad women, so she found this photo for me to use, incorporating both the lovely lady and a lobster. I didn't have the heart to say that wasn't a Maine lobster at the time, and to be honest, I wasn't sure it was a lobster at all. I liked the thought (and the photo, heh) and went with. Someone pointed out later that it is indeed a lobster of the Caribbean variety, so technically the symbolism is accurate, I suppose... Thanks again, KC and JAM, that thread was fun.