Gaslighting, Narcissist, and More Psychology Terms You're Misusing
time.com
time.com
In 1965, twenty-eight years after the stageplay was written, writers began denominalising the film's title and using it as a verb, "gaslighting". Gaslighting, in this context, is a colloquialism that loosely means to manipulate a person or a group of people in a way similar to the way the protagonist in the play (Bella) was manipulated.
[1]: https://en.wikipedia.org/wiki/Gas_Light
I think APA considering it a colloquialism would count here as a psychological term.