Crossword clues for the word: SNEAKUP The word SNEAKUP has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for SNEAKUP Showing 1 to 6 of 6 results Clue(s) ___ on (catch offguard) "Get closer, really quietly" Approach stealthily, with "on" Creep closer. Prepare to pounce Prepare to surprise, with "on"