Definitions

1. noun

A condition of being excessively patriotic or nationalistic, often to an irrational or excessive degree.

“The politician’s americanitis became a subject of ridicule in the media for her over-the-top displays of patriotism.”

2. noun

A hypothetical disease or condition that is allegedly unique to or prevalent in the United States, often used as a pejorative.

“The comedian joked about the so-called ‘americanitis’ that supposedly afflicts all Americans, but is actually just a myth.”