slip, slip-up, miscue, parapraxis

a minor inadvertent mistake usually observed in speech or writing or in small accidents or memory lapses etc.

• Freudian slip — a slip-up that (according to Sigmund Freud) results from the operation of unconscious wishes or conflicts and can reveal unconscious processes in normal healthy individuals

• mistake, error, fault — a wrong action attributable to bad judgment or ignorance or inattention