What fashionistas really are, because they make you feel that there is only one right way to dress. Which is to say that fascistonista is merely a synonym for fashionista which calls attention to the fascistic element of "fashion" and "style." You have to wear Sebago shoes--that was a fascistonistic principle when I was in junior high in Ohio--and now look how sad and dumb it looks.
If it were up to me, I would wear cut-off jeans, but I fear the scorn of the fascistonistas. On the other hand, in 1995 a fascistonista encouraged me (with a riding crop) to update my ten-year-old radar-dish glasses and I immediately became less repellent to women.