sneaking adjective 1noun 1forms 3phrases 1 adjective1 •Secret or underhand; not openly avowed. noun1 •The act of one who sneaks.Then there was much mirth and banter over the swift sneakings for home of certain men carrying large portions of puarka. — 1915 formssneakings · more sneaking · most sneaking Phrases with sneaking sneaking suspicionA premonition, or hunch; a belief based on little evidence.