"Mash It Up" or alternative title "Fuck Shit Up" (sometimes "F*@k S#*t Up") produced by Greg Stainer & UnderGround Procedures (UGP) is a 2011 single by Canadian artist Karl Wolf from his 2012 album Finally Free. The single released in 2011 is the second single from the album Finally Free and a follow-up of the initial single "Ghetto Love". The single was released in two titles, "Fuck Shit Up" and the "clean" radio-friendly version "Mash It Up".