"The Jack" is a song by Australian hard rock band AC/DC. It is the third track of their Australian album T.N.T, released in December 1975, and was written by Angus Young, Malcolm Young, and Bon Scott. It is also the third track on the international version of High Voltage, released in May 1976.It's one of the few slow-paced songs in the band's catalog, and displays a heavy blues influence.