People who go to church but don't believe in god? People who are vegetarians on a moral basis but wear leather jackets? They are engaging in hypocrisy, or behavior that is different from what they say they believe.

A hypocrite is a person who practices hypocrisy: what they say is not what they do. The noun hypocrisy descends from the Greek hypokrisis "acting on a stage," from hypokrinesthai "to play a part, pretend," from the prefix hypo- "under" plus krinein "to judge." Many times kids are enraged by their parents' hypocrisy when parents make their children follow rules they don't follow themselves.

Definitions of hypocrisy

n insincerity by virtue of pretending to have qualities or beliefs that you do not really have

sanctimoniousness, sanctimony
the quality of being hypocritically devout
fulsomeness, oiliness, oleaginousness, smarminess, unction, unctuousness
smug self-serving earnestness
Type of:
falseness, hollowness, insincerity
the quality of not being open or truthful; deceitful or hypocritical

n an expression of agreement that is not supported by real conviction

lip service
crocodile tears
a hypocritical display of sorrow; false or insincere weeping
Type of:
dissembling, feigning, pretence, pretense
pretending with intention to deceive

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