Honestly, it's very hard to say. For years, it was only licensed clinicians who used this term. A therapist would know what gaslighting is, but that's about it.
Between you and me, I think it's redditors who misused and overused it. Lying to someone is really awful, but it's not abusive. Gaslighting someone is definitely abuse; it will shape someone's emotional well-being for the rest of their life if they fail to address it. I think a lot of people on the internet use the term to say, "not only did he lie, but he knew that he was lying and therefore he abused me; same if he had busted my lip!" People on the internet want to powerlevel and get pitypoints, after all.
Most people who misuse this term will apply it to someone who says, "I wasn't being rude!" If they think you were rude and you know you were rude, they'll call that gaslighting. You just abused them by accidentally communicating in a way they didn't like.
It's totally messed up because people who actually were gaslighted for years get their experiences erased. "Oh, your husband lied to you? Cry me a river!" But that's not what it is.
A huge portion of internet wine-moms know that they're wrong to use this term, but they do it anyway, "because language naturally changes and evolves." I hate it.
