Hello, Pepa. Welcome aBoard!

I found the term ‘fat-phobic’ on the Psychology Today website. Here is a link to the article: http:// http://cms.psychologytoday.com/articles/pto-20010301-000037.html .

The term seems to be fairly prevalent on the web, but that’s no indication of the term’s validity. Unfortunately, I couldn’t find an official list of psychological phobias anywhere that listed the specific phobia you mentioned.