Crossword clues for the word: JIMBACKUS The word JIMBACKUS has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for JIMBACKUS Showing 1 to 3 of 3 results Clue(s) Player of Thurston Howell III Thurston Howell III portrayer with a degree? Voice of Mr. Magoo