An adequately manipulated version of the word 'Retard'. It's use is less derogatory than the standard and is utilized for criticism, hating, and pet names.
The word is also sometimes confused when someone, who carries a speech impediment, says the word 'Retard'--for that usage is more derogatory than 'Rerawr'.

When you eat dirt for the first time and leave your family to build a shack in the woods