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Related to pseudologia phantastica: Pseudologica phantastica
an elaborate and often fantastic account of a patient's exploits, which are completely false but that the patient appears to believe.
pseu·do·lo·gi·a phan·tas·ti·ca(sū'dō-lō'jē-ă fan-tas'tik-ă)
A fantastic account of a patient's exploits, which the patient appears to believe.