1) lying or falsity; 2) Feigned insanity; 3) Falsely alleging responsibility for a crime.
irrational predilection for lying
1. A factitious mental disorder. ... 2. <psychiatry> A mental disorder in which the patient alleges to have committed a crime, but of which he or she is innocent. ... 3. Generally, the morbid impulse to falsify or lie, as in pseudologia. ... (05 Mar 2000) ... 
Type: Term Pronunciation: sū′dō-mā′nē-ă Definitions: 1. A factitious mental disorder. 2. A mental disorder in which the patient falsely claims to have committed a crime. 3. Generally, the morbid impulse to falsify or lie, as in pseudologia.
pseudomania, pseudomaniac 1. A mania for lying; an insane tendency to make false statements. 2. A symptom in which the patient accuses him/herself of having committed crimes of which he/she is really innocent.