Keep going; you’re on the right track/doing well. This term dates from the early twentieth century, and there is some dispute over its origin. Several sources trace it to the 1920s in African-American speech; another holds it is an American version of the British Bang on! used by airmen during World War II, or possibly a shortening of Right on target. Still another holds it is a shortening of Right on cue, a reference to uttering the correct lines in a play. In any event, it became widely used in the 1950s and 1960s. Kate Millett had it in Flying (1974): “Right on, Vita, so you must have waged your woman’s war for years.”