Michael Ryan Pritchard, better known as Mike Dirnt, is an American musician. He is best known as the bassist, backing vocalist, and co-founder of the American rock band Green Day. He has also played in several other bands, including The Frustrators. His stage name was originally a nickname from his friends at grade school, as he would constantly play air bass and make a dirnt, dirnt, dirnt noise while pretending to pluck the strings.
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