"Flex" is a song co-written and performed by Jamaican dancehall recording artist Mad Cobra, issued as the first single from his sixth studio album, Hard to Wet, Easy to Dry (1992), by Columbia Records. It is his only song to appear on the US Billboard Hot 100, peaking at number 13 in January 1993. It also peaked at number one on the Billboard Hot Rap Singles chart and on Canada's The Record singles chart.