IdiomsVersion en ligne Match the information with the correct idiom. par Diego Cabrera B 1 Back-seat driver 2 Chip on your shoulder 3 Lamb to the slaughter Someone who criticizes from the sidelines. This comes from the annoying habit of some people of giving unwanted advice to vehicle drivers A perceived grievance or sense of inferiority. The phrase 'a chip on one's shoulder' is reported as originating with the nineteenth century U.S. practice of spoiling for a fight by carrying a chip of wood on one's shoulder, daring others to knock it off. In an unconcerned manner unaware of the impending catastrophe.