- cowardly, stealthy, underhanded, or furtive: a sneaking manner
- not admitted or made known to others; secret: a sneaking fondness for candy
- slight, or slight but increasing: a sneaking suspicion
- Acting in a stealthy, furtive way.
- Unavowed; secret.
- Gradually growing or persistent: a sneaking hunch.
- Present participle of sneak.