bad faith

noun

1. lack of honesty and trust: Bad faith on the part of both negotiators doomed the talks from the outset.

noun

1. intention to deceive; treachery or dishonesty (esp in the phrase in bad faith)
2. Also called: mauvaise foi (in the philosophy of the 20th-century French philosopher Jean-Paul Sartre) self-deception, as when an agent regards his actions as conditioned by circumstances or conventions in order to evade his own responsibility for choosing them freely