Jingoism

Jingoism is a term used to describe extreme patriotism, especially in the form of a warlike foreign policy. The term is often derogatory. The foreign policy of the United States has been described as jingoist many times throughout history, most recently in reference to how the United States handled the Iraq War.

The term comes from the now outdated and derogatory noun jingo, which describes one who vehemently supports policies that favor war, especially in the name of extreme patriotism.