Regrot (noun): A term used to describe an overwhelming feeling of regret and horror, often caused by witnessing or experiencing something truly traumatic or disturbing that leaves a lasting impact on one's psyche. The word may be a misspelling or a regional variation of the word "regret." It is often used to express a deep desire to forget the experience entirely and to rid oneself of the associated emotions and memories.
Person 1: "Have you seen those disturbing videos on the internet lately?"
Person 2: "Yeah, I stumbled upon one of the Mexican cartel videos and now I'm experiencing some serious regrot. I wish I could erase it from my memory forever."
Feeling you get the morning after throwing up/ falling over/ talking to the wall about the universe being made out of segments on account on having over-indulged in the drug ketamine.
I thought I threw up on my front doorsteplast night, but when I came round I realised it was my flatmate's bed. Major regretamine.
A phrase that has been ironically quoted by many vtubers after a Twitter user posted screenshots of an alleged vtuber asking for free art saying "I'm a vtuber and you'll regret this" after the artist refused.