Big Jack was released by Australian hard rock band AC/DC on their 2008 album Black Ice, a record that marked their return after an eight year gap between studio albums. Written in the band's familiar blues rock style, the song became a fan favourite for its chantable title hook and compact riff. Short clips of the opening have since circulated online as a soundboard staple, reused in edits far from the original album context because the name check and guitar punch are instantly identifiable to rock fans.