Over a long period of time a person makes someone question who they are and if they are worth it. A person often questions themselves if they are the reason the person it like this. Form of abuse. Manipulating a person to think they are worthless, crazy, insane, mad and always in the wrong.
"Bob is always being manipulated by him."
"This has been going on for Years, and he always asks if he's the reason why they're in this mess"
"Yeah, I told you and Bob, its gaslighting."
To manipulate events and situations in order to make a person believe that he or she is crazy.
From the 1944 movie with Charles Boyer and Ingrid Bergman.
He kept stealing her keys and putting them in the freezer in order to gaslight her.
Doesn’t exist. You made it up cause you’re fucking crazy
Damn she's fucking crazy. She totally thinks gaslighting exists.
Making someone feel as if they’re fucking nuts
eli is gaslighting me when we have talks at parties.
"Those thugs are trying to gaslight the count" (Capt. Binghamton; Season 4, Episode 29 of "McHale's Navy").
When you fart into a lit match and it explodes
I had like 4 bowls of chili at Rick's Superbowl party. The resulting fart was brilliant, as was the size of the flame it produced. A proper halftime gaslighting.