abydocomist

Etymology
From, after the town , the inhabitants of which were known for inventing slanders and boasting of them.

Noun

 * 1)  A liar or sycophant who boasts of his falsehood.
 * 2) * The character Sir John Falstaff from Shakespeare's plays (Henry IV Part 1, Henry IV Part 2, Henry V, and The Merry Wives of Windsor) is a famous example of an abydocomist.
 * Falstaff: "I may lie, but I am no counterfeit." (paraphrased)