I agree, that "bipolar" does get thrown around a lot by people who have no idea what it actually means. It is becoming the new "postal" or whatever else.

How about....

KIAD - Know-It All Disorder: for those who can't help but tell you why you're wrong and know absolutely nothing about yourself or how the world works.

IPSS - Implusive Propaganda Spreading Syndrome: for those wonderful people who can't help but send you every untrue e-mail that comes to them, despite knowing it's full of hate and lies, and acting shocked when you pull up the truth on Snopes.