This is a combination of "cat fishing" and "gas lighting". When some pretends to be someone they're not and then tries to convince you that they never gave you that idea.
This guy tried catlighting me. I was convinced when we chatted that he was a Top... but he was on all 4s as soon as we met.
cat·light /ˈcatˌlīt/
verb
gerund or present participle: gaslighting
Manipulate humans (and dogs) using psycatogical methods into questioning their own sanity or powers of reasoning. Ex. meowing at nothing as if something is there or meowing and pretending you didn't.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.