Crossword clues for the word: KNOWITALL The word KNOWITALL has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for KNOWITALL Showing 1 to 6 of 6 results Clue(s) "Smart aleck, say" Advice-disdaining sort One needing no advice Smarty-pants Walking encyclopedia Would-be expert