https://en.m.wikipedia.org/wiki/Gaslight_(1944_film)

The term “gaslighting” originates in a British play-turned film from the 1930s. The play was called “Gas Light” and the plot is about a husband who mentally and emotionally manipulates his wife into believing she is crazy by changing the intensity of the gas lamps within their home.

It's not a term. You're imagining it because you're crazy.

Rome 0 BC

I always think of lighting farts.