(of a feeling) persistent in one's mind but reluctantly held or not fully recognized

I've a sneaking suspicion they'll do well

furtive and contemptible

an unpleasant, sneaking habit

move or go in a furtive or stealthy way

I sneaked out by the back exit

(especially in children's use) inform an adult or person in authority of a companion's misdeeds; tell tales

she sneaked on us