(n.) One who is guilty of perjury; one who perjures or forswears, in any sense.

Ananias Baron Munchausen Father of Lies Satan Sir John Mandeville consummate liar dirty liar equivocator fabricator fabulist false witness falsifier fibber fibster habitual liar liar mythomaniac palterer pathological liar prevaricator pseudologist pseudologue sober spinner of yarns storyteller yarn spinner yarner