Freudian slip
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 an unconscious subdued wish or internal train of thought. The concept is part of classical psychoanalysis.
Classical examples of parapraxes involve slips of the tongue and of the pen, but psychoanalytic theory also embraces misreadings, mishearings, temporary forgettings, and the mislaying and losing of objects. Wikipedia