Overkill is an American thrash metal band, formed in 1980 in New Jersey. They have gone through many line-up changes, with singer Bobby "Blitz" Ellsworth and bassist D.D. Verni remaining from the original lineup. Along with Anthrax, whose one-time lead guitarist Dan Spitz was also an early member of Overkill, the band is one of the most successful East Coast thrash metal bands. The band has a notable mascot named "Chaly", a skeletal bat with a skull-like face, horns, bony wings, and green eyes. Chaly has appeared on most of their album covers.