rah-rah

The word "rah-rah" is a quintessential example of expressive reduplication in American English, emerging in the late 19th century from the spirited culture of college athletics. It originates from the cheerleading chant "rah! rah! rah!", a stylized shout of encouragement meant to rally a team and its supporters. This repetitive, rhythmic cry was lexicalized into an adjective and noun to describe the boisterous, uncritically enthusiastic spirit associated with such cheers. Its journey from a mimetic stadium chant to a term describing any kind of fervent, often simplistic zeal perfectly illustrates how language formalizes sounds of collective emotion into concepts of attitude and behavior.

This is a reduplicative formation, a common process in English where a word or syllable is repeated, often with slight variation, to create a new word with an expressive or emphatic meaning. The term "rah" itself is an onomatopoeic interjection imitating a shout of encouragement or triumph.