a secret agreement or understanding for a deceitful or fraudulent purpose

secret understanding, often with intent to defraud

(an act of) criminal dishonesty; a person who pretends to be qualified, to have authority or to want to be kind, but who is or does not

trickery, deception

to cheat a person (in order to get money etc)

cheating, stealing

the act, result, of being treacherous

disloyalty, dishonesty

deception, joke

deception, joke