One who frequently tells lies.

plural of liar

(childish) used to taunt a liar

(idiomatic) A general expression of distrust, particularly implying that another person is attempting to deceive the speaker, or that a situation is not, or can not be, as it appears.

An American bar game based around guessing the frequencies of digits in the serial numbers of dollar bills held by the various players.

Any of various dice games based on bluffing and deception.

(philosophy, logic) A paradox involving statements such as "this sentence is false", or "the following statement is true: the previous statement is false", which cannot be meaningfully regarded as either true or false.

plural of liar paradox

(informal, derogatory) A stated-income (US) or self-certificated (UK) loan secured by a mortgage granted without the lender verifying information provided by the applicant as to financial or employment status.

(psychology) A person who tells lies frequently and compulsively.