I have two to contribute:
Self Esteem Queen: Often a "6 week wonder" in behavior, the self esteem queen has no interest in learning how to belly dance well. For her...it's all about how many people she can get to tell her she looks great in her costume and how beautiful she feels onstage. Often seen merely wiggling around at random and posing on stage and on youtube videos, typically surrounded by individuals who have no clue she can't dance but are praising her and telling her what she wants to hear about her dancing because they find her attractive. The self esteem queen can be identified by her lack of skill, refusal to learn or practice, and immense pride in the fact that she "hasn't even been belly dancing that long."
Usage: I tried to find some examples of new belly dancers I haven't yet heard of, but all that came up were a bunch of self esteem queens who weren't even coming close to belly dancing.
The Shimmy Spirit: The shimmy spirit is the entity that takes over the body and mind of belly dancers and belly dance students and causes them to unconsciously drill moves or try out combinations at odd times.
Usage: Everyone at work looked at me strangely today. I was in the copy room and the shimmy spirit made me start practicing my egyptian shimmy while I waited for the machine to warm up.