congenital liar• A day didn't pass now during which it failed to occur to her that she had borne two congenital liars.• Safire, who ungentlemanly called Hillary a congenital liar, knows something of which he speaks.• Of course, in that environment, being a congenital liar was small potatoes.
Origincongenital
(1700-1800)Latincongenitus, from com- ( → COM-) + genitus (past participle of gignere; → GENITAL)