If you ain't cheatin', you ain't trying...
NASCAR driver Richard Petty, in a 1972 newspaper article, was said to have once remarked, “If you ain’t trying to cheat a little, you ain’t likely to win much.” Also in 1972, a television character (a rodeo rider) had as his motto, “If you ain’t cheatin’, you ain’t trying’.” The saying became popular by the early 1990s.