Give Up the Ghost (originally named "American Nightmare" sometimes stylized as A.N.) is a hardcore punk band from Boston, Massachusetts.

Give Up the Ghost was formed when Tim Cossar and Wesley Eisold (who was then a roadie for Ten Yard Fight) met up with Azy Relph and Jesse Van Diest in 1998. They recorded a demo tape in 1999, followed by their debut release, a self-titled 7", on Bridge 9 Records under their original name American Nightmare in 2000. After extensive touring and line-up changes, the band recorded their second release 7", The Sun Isn't Getting Any Brighter. This was later combined with their self-titled effort to form Year One, which was released posthumously.