A pun that combines the disorder of anorexia with tanning. Is used to describe people, usually white women and teen girls, who are very tan/dark in skin tone. Tanorexics are more specifically women who purposely get tan by either sunbathing frequently or by a fake bake. It was suggested that, like anorexics, they have an addiction to tanning and won't stop no matter how dark they get. Hence, the term tanorexic.
Christina Aguilera was a full-blown tanorexic; Lindsay Lohan is borderline tanorexic.