Other forms: Freudians; Freudianly
The adjective Freudian is useful for describing something that's influenced by or similar to the theories of German psychoanalyst Sigmund Freud.
A Freudian is a therapist who subscribes to the techniques for treating patients that Sigmund Freud developed in the late 1800's. A Freudian analyst, for example, typically spends a lot of time exploring her patient's childhood, interpreting dreams, and encouraging free association, or talking freely about whatever comes into the patient's head. Another common use of the adjective is in the term "Freudian slip," a mistake, especially in speech, which supposedly has a deeper subconscious meaning.