chicanery \shih-KAY-nuh-ree\ (noun) - 1 : The use of trickery or sophistry to deceive (as in matters of law). 2 : A trick; a subterfuge.
"Here's how to talk and keep the upper hand:
For no man's half as barefaced as a woman
When it comes to chicanery and gammon." -- Geoffrey Chaucer, 'The Canterbury Tales
Chicanery comes from French chicaner, "to quibble, to use tricks," perhaps from Middle Low German schicken, "to arrange," with the sense "to arrange to one's own advantage."