Possible Clues:

• Canadian for dunce, dweeb or dolt
• Car wash employee, at times
• Bozo, in Canada
• Idiot, in Canadian lingo
• Canadian blockhead
• Canadian chowderhead
• 'The Great White North' insult
• One washing down a driveway, e.g.
• Canadian slang for loser that's also one letter away from 'loser' and 'poser'
• Lout, north of the border