Deride means to mock or make fun of someone, usually in a disrespectful way. FLOUT means to openly disregard or disobey a rule or law. SCOFF means to laugh at or mock something or someone in a scornful manner. DISDAIN means to regard with contempt or SCORN. SCORN means to reject or dismiss something as unworthy or beneath one's dignity. DEFY means to resist or challenge authority or convention. To thumb one's nose at someone is an expression that means to show contempt or defiance towards them.