Top Definition
A non-contagious but highly destructive disease that causes its host to fly off the handle on impulse; symptoms include irrational pendulum-swinging, outbursts of libertarian ideology, hyperbolic ranting, and making a ton of rhetorical waffles.
Andrew Sullivan's response to the removal of Branden Eich was a textbook case of Sullivanitis.
by Dish-reader April 10, 2014

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