taoeffect on Nostr: It comes from a 1938 play, where it referred to a specific type of lie that was made ...

It comes from a 1938 play, where it referred to a specific type of lie that was made in an attempt to convince someone they were going insane (in order to later steal from them), but its usage seems to have broadened a bit.

Via: https://www.newportinstitute.com/resources/mental-health/what_is_gaslighting_abuse/