crooked collarbones

a more discreet way of telling someone you have an eating disorder (mostly used by people that suffer from anorexia or bulimia).
sometimes, if you get very thin or lose a drastic amount of weight, you'll see that most people's collarbones are a bit crooked. something you won't notice on non-thin people.

may sound stupid if the person you're talking to doesn't know this, but it can help just trying to say it out loud more discreetly in the beginning.