wannarexic UK /ˌwɒn.əˈɹɛk.sɪk/US /ˌwɔn.əˈɹɛk.sɪk/ noun1 •(slang, offensive) One who does not have the eating disorder anorexia nervosa, but wishes to.While some experts say these girls likely have body image issues or could develop a more serious eating disorder, wannarexics usually range between healthy and overweight. — 2007 formswannarexics