Icey: You've got a point on that, I personally am not overly upset by the use of the term "Fat" when applied to me. Kinda how I dealt with being called fat in the past is I kinda just went, yep im overweight, i'll adopt fat -pats fat-. However for alot of other people fat was a traumatizing word like in highschool and in middle school, movies and so forth for that matter. Not to say super skinny people didnt get similair grief because I know they did, but...

Where skinny and thin were often compliments at least where I went, admittedly rail thin might not be the best descriptive term but for me, its one of the only ones I can think of to describe like realllllly skinny people.

But I have seen instances where people with really skinny legs or such did get ragged on, often times though they were made fun of using other words then skinny like, chicken legs or so on.

Thats not to say someone shouldnt be offended by the term skinny, if someone is im sure they have a perfectly good reason to be, but skinny and/or thin (which would thin be better?) are the only words I can think well, plus respective adjectives, that would be the most friendly I suppose.