> I am deliberately MISexpressing myself. I just made a word, and unusually, I'm not even proud of it.

Then don't. It might be too simple for me (a guy) to say so, but if you feel so strongly about it, you shouldn't continue doing the thing you actually don't want to do. I'm guessing your male colleagues will eventually come accustomed to the way you look, rather than being startled every single day. I get it though: I don't usually dress up for meetings with other "techies", although I do like wearing suits. That doesn't mean however I go about wearing t-shirts just because I want to fit in, I figure you shouldn't want to do that.

In short: no, don't do it, do what you feel like. The guys at work will (hopefully) accept it.