cliffing-it Share definition Flag High risk construction - earthworks escavating with heavy equipment at the top of cliffs, landslides or slips. The driver with a digger is 'cliffing-it' at the top-end of an active 200m/600ft high landslide. cliffing-it by takeariskonacliff November 29, 2011 Get the cliffing-it mug.