In existentialist philosophy, bad faith is an escape from anxiety and despair, etc. into a false or inauthentic way of existence.
Sartrean definition and examples
In Sartrean existentialism, bad faith is characterized by moving toward one pole of human existence. Sartre gives several examples in ___ to characterize different modes of bad faith. It is worth noting that, according to Sartre, bad faith can never be fully escaped, only temporarily avoided, and most people spend most of their lives unable to avoid it.
Simone de Beauvoir's typology
In The Ethics of Ambiguity, Simone de Beauvoir creates a sort of typology of bad faith, outlining several archetypal patterns it can follow. It is worth noting that in Beauvoir's philosophy many of these modes of bad faith can lead to an acceptance of or participation in fascism.
Rejects transcendent aspects of own existence, hides in determinism, etc.
Rejects own existence, leads him to reject existence of others.
Rejects being for others. Wants to think his existence is entirely self-defined.
Believes that object of passion is disclosed only through his subjectivity.