The term 'Dickensian Orphan' refers to two characters from the works of Charles Dickens, Oliver Twist and Nell. Oliver is a young orphan who is the protagonist of the novel 'Oliver Twist'. Nell is an orphan from the novel 'The Old Curiosity Shop'. Both characters are portrayed as victims of poverty and social injustice, and their stories serve as a commentary on the harsh realities of life in Victorian England.