Freudian Slip - Short

A Freudian slip, also called parapraxis, is an error in speech, memory, or physical action that is interpreted as occurring due to the interference of some unconscious ("dynamically repressed") wish, conflict, or train of thought. The concept is thus part of classical psychoanalysis.

Slips of the tongue and the pen are the classical parapraxes, but psychoanalytic theory also embraces such phenomena as misreadings, mishearings, temporary forgettings, and the mislaying and losing of objects.
In general use, the term 'Freudian slip' has been debased to refer to any accidental verbal slips of the tongue.^[1] Thus many examples are found in explanations and dictionaries which do not strictly fit the psychoanalytic definition.

For example: He: 'What would you like—bread and butter, or cake?' She: 'Bed and butter... Whoops!'^[1]
In the above, the woman may be presumed to have a sexual feeling or intention that she wished to leave unexpressed, not a sexual feeling or intention that was dynamically repressed. Her sexual intention was therefore secret, rather than unconscious, and any 'parapraxis' would inhere in the idea that she unconsciously wished to express that intention, rather than in the sexual connotation of the substitution.