Un-American

Un-American is a pejorative term of U.S. political discourse which is applied to people or institutions in the United States seen as deviating from what are widely perceived to be fundamental American cultural and political values.

The most famous use is in the title of the House Un-American Activities Committee which was started to investigate alleged disloyalty and subversive activities on the part of private citizens, public employees, and those organizations suspected of having Communist ties. By 1959, former President Harry S. Truman had denounced the Committee as the "most un-American thing in the country today". The Committee lost considerable prestige as the 1960s progressed, and it was abolished by the House of Representatives in 1975.