Claim: The Freudian slip, also known as parapraxis, is a concept that is a part of classical psychoanalysis and is named after Anna Freud—who referred to these as Fehlleistungen (“faulty functions”).
Evidence: The Freudian slip is named after Sigmund Freud, who, in his 1901 book The Psychopathology of Everyday Life, described and analyzed a large number of seemingly trivial, even bizarre, or nonsensical errors and slips, most notably the Signorelli parapraxis.