Georg Albert Ruthenberg (born August 5, 1959), or better known by his stage name Pat Smear, is an American musician. He is best known for being the lead guitarist and co-founder of Los Angeles-based punk band The Germs and for being a rhythm guitarist for the rock bands Nirvana, where he played live band appearances, and Foo Fighters, with whom he has recorded six studio albums. After Nirvana disbanded following the suicide of its frontman Kurt Cobain, drummer Dave Grohl went on to become the frontman of rock band Foo Fighters, with Pat soon joining on guitar. He left Foo Fighters in 1997, before rejoining as a touring guitarist in 2005, and has been a full-time member since 2010.