This is a hugely loaded term for me, and being fat has been one of the major defining issues in my life. I'll spare you all too much navel-gazing and soap-boxing on the subject, but I am one of those people who is doing my best to reclaim the word "fat" as a neutral descriptor. The judgements implied in the various euphemisms bother me, as do the assumptions that my body size is an telltale indicator of my health status, nutritional habits, and the amount of exercise I get. I will accept the argument that obesity is correlated with many greater health risks, but it does not follow that these correlations mean that every person who has the misfortune to be obese has the same health problems or practices the same behaviours. The converse is true for those who are very thin, of course.
As much as I am trying to practice fat acceptance (or really body acceptance in general), it is a very difficult thing to do, particularly if you have an interest in fashion. We fat women are constantly bombarded with negative messages, it is hard to find clothing that fits let alone flatters, and the loudest message I hear is that I will always be ugly and unacceptable, no matter what I wear or what I achieve, because I am fat. Fighting against this message is at the heart of all my sartorial struggles.
I do try my best to notice when I am falling into this judgemental trap myself, and examine what I am thinking and why. It is hard to be accepting of myself and others when the reality is that I am not happy with my body, but I also know that for me, at least, that learning to accept my reality and work with it rather than continuing to hate myself for my perceived shortcomings is a far more important goal. And avoiding judging others is important to me, too. We all have a right to choose our own behaviour, within obvious legal limits, and we all have a right to dignity no matter how stupid or ridiculous our choices may seem to someone else.