"Let's Get It Up" is a song by Australian hard rock band AC/DC, first released on their 1981 album For Those About to Rock We Salute You, and later as its first single. Singer Brian Johnson summarised the track to Kerrang!'s Sylvie Simmons as "Filth, pure filth. We're a filthy band." Live versions of "Back in Black" and "T.N.T.", released as B-sides on the UK's version of the single, were both recorded in Landover, Maryland, in December 1981. "T.N.T." only appeared on the 12-inch edition.