Stereotypical term for yuppie mall-rat sun-worshipping indoor tanning teen girls. Bleach blonde hair, dangerously skinny, protruding hipbones, way too much makeup. Look as though they'd fall over if you touched them.
95% of all white surburbian girls.
"What do you think of that girl Sally?"
"Can you say tanarexic? She looks frightening. And disgusting."