In George Orwell's book "Animal Farm", Napoleon is represented as a scary and intimidating pig, who controls the other animals through fear and propaganda. In the book, the first descriptions of him were "fierce-looking" boar "with a reputation for getting his own way." as well. Napoleon was also a metaphor for Joseph Stalin, so the animals on Animal Farm see Napoleon the same way people saw Stalin. For example, both Stalin and Napoleon surrounded themselves with guards, they were cruel, and wanted power and were willing to use any means necessary to get it.
A slant rhyme is a half-rhyme, where the words kind of rhyme, but not really. "Dark" and "work" sort of rhyme, but not fully. In a slant rhyme, the vowels don't rhyme.