Crossword clues for the word: SLIPIN The word SLIPIN has appeared as an answer to at least 8 crossword clues on different crossword puzzles. Crossword clues for SLIPIN Showing 1 to 8 of 8 results Clue(s) Add sneakily Add subtly Add surreptitiously Arrive unnoticed Enter unnoticed Enter unnoticed: 2 wds. Enter without being noticed Mention casually