Gaslighting

Gaslighting is the manipulation of someone into questioning their own perception of reality.^[2][3] The expression, which derives from the title of the 1944 film Gaslight, became popular in the mid-2010s.^[4]

Some mental health experts have expressed concern that the term has been used too broadly. In 2022, The Washington Post described it as a notable example of therapyspeak, arguing it had become a buzzword improperly used to describe ordinary disagreements.^[5]