You have the right to use whatever word you like. You have the right to use offensive words. You have hundreds of thousands of words to chose from.<p>"Anorexic" is an odd choice. Dealing with this purely from a linguistic point of view, and ignoring the "you might offend a few people" point of view, there are some unfortunate connotations.<p>Anorexia is a serious mental health problem. "The mentally ill start-up"?<p>Anorexia is, when we adjust for age etc, the most lethal mental health problem. About 1 in 5 anorexics die from it. "The at risk of death start-up"?<p>Anorexia in its severe forms is very distracting for the person. It takes a lot of effort to avoid eating; it takes a lot of concentration to count calories; it takes a lot of effort to 'body check' before you leave the house. "The distracted start-up"?<p>Anorexia leaves the person weak, susceptible to illness, and unable to do much. "The frail start-up"?<p>There are better words for "ultra lean".