A person who will go under another person's comments and try to gain notoriety. This can be either in the form of straight-up self-promotion or trying to sneakily redirect people to their social media. There are many form factors of doing this and a multitude of ways to do this.
Example:
(Person commenting under post): "No cap i make better content then 'insert influencer' and will always!"
U suk u stupid n00b i fuk ur mom every nite
Arabs are smelly terrorists!
U hate BOTDF? Ur a fat ugle cunt kill urself!!! *chokes on cocks and dies of gonorhoea*
The degeneracy is extreme...