Devious
Part of speech: adjective
Definition: Deviating; not straightforward, not honest, not frank; not standard.
Example sentence: In the summer of 1963, my second with 'Sports Illustrated,' Jerry Tax, the basketball editor, got the Celtics' Frank Ramsey, the NBA's first famous sixth man, to do a piece for the magazine revealing some of the devious little tricks of his trade. Things like surreptitiously holding an opponent's shorts - nickel-and-dime stuff.
Shifty
Part of speech: adjective
Definition: Having the appearance of someone dishonest, criminal or unreliable; such as someone with shifty eyes.Subject to frequent changes in direction.