Crossword clues for the word: SILLYBILLY The word SILLYBILLY has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for SILLYBILLY Showing 1 to 5 of 5 results Clue(s) Clownish one Clownish type Dotty and William - one's a fool Not so smart with rhymes? William IV of England.