One who frequently tells lies.

plural of liar

(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.

Any of various dice games based on bluffing and deception.

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

The benefit received by those spreading fake information as a consequence of the environment in which there is a great deal of fake information and hence it is unclear what is real and what is fake.

(childish) used to taunt a liar

A mortgage loan for which the borrower made a statement of claimed income and assets which was not verified by the mortgage originator.

plural of liar paradox

(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.