parapraxis

n. failure, unsuccessful action

A Freudian slip, or parapraxis, is an error in speech, memory or physical action that is believed to be caused by the unconscious mind. Some errors, such as a man accidentally calling his wife by the name of another woman, seem to represent relatively clear cases of Freudian slips. In other cases, the error might appear to be trivial or bizarre, but may show some deeper meaning on analysis. As a common pun goes, "A Freudian slip is like saying one thing, but meaning your mother." A Freudian slip is not limited to a slip of the tongue, or to sexual desires. It can extend to our word perception where we might read a word incorrectly because of our fixations. It is important to note that these slips are semi-conscious. This is to say that these thoughts are consciously repressed and then unconsciously released. This is unlike true Freudian repression which is the unconscious act of making something unconscious.
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Noun
1. a minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc.
(synonym) slip, slip-up, miscue
(hypernym) mistake, error, fault
(hyponym) Freudian slip

A lapse of memory or a slip of the tongue, usually revealing a hidden thought