Georg Albert Ruthenberg, 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 grunge band Nirvana, and Foo Fighters. After Nirvana disbanded following the suicide of its frontman Kurt Cobain, drummer Dave Grohl went on to become the frontman of Foo Fighters with Smear joining on guitar. Smear left Foo Fighters in 1997 before rejoining as a touring guitarist in 2005 and being promoted back to a full-time member in 2010.

The Germs were an American punk rock band from Los Angeles, California, originally active from 1976 to 1980. The band's "classic" lineup consisted of singer Darby Crash, guitarist Pat Smear, bassist Lorna Doom and drummer Don Bolles. They released only one album, 1979's (GI), produced by Joan Jett, and were featured in Penelope Spheeris' seminal documentary film The Decline of Western Civilization, which chronicled the Los Angeles punk movement. The Germs disbanded following Crash's suicide in 1980. Their music was influential to many later rock acts, and Smear went on to achieve greater fame performing with Nirvana and Foo Fighters.