Cant. [f. SNEAK sb. or v.] (See quots. 1812, 1859.)
1812. J. H. Vaux, Flash Dict., Sneaksman, a man or boy who goes upon the sneak.
1834. Ainsworth, Rookwood, III. v. There was no such sneaksman … going.
1859. Slang Dict., 97. Sneaksman, a shoplifter; a petty cowardly thief.
