Usually 7-12 year olds on YouTube who think that commenting "first", "early", "notification squad" on a new video is going to make them cool and popular, when it, in fact, does the complete opposite.

a comment that is supposed to be hurtful but the writer uses a fairy emoji to make it funny.

To disable lines of code in a program by surrounding them with comment-start and comment-stop characters.

This means that the code written inside the comment-start and comment-stop area will be treated as the programmer's comments and will not be run.

The place where all logic, reason and common sense are stripped away. No place has known the sheer concentration if ignorance before youtube comments. Racism, sexism, appeal to emotion and pure hatred are commonplace.

A sexual comment that goes too far or is extremely weird. Usually the comment makes the rest of the audience feel very awkward.

Where you can find all the racism, homophobia and other lunacy seen on YouTube comments, with significantly better grammar.

The place that is filled with fanatics, wannabe environmentalists, fake ecologists, racists, misogynists, misandrists, illiterate idiots, consiracy theorists, misanthropes, SJWs, feminazis, madmen (and madwomen), weeaboos, otakus, the mentally ill and idiots in general arguing with each other about trivial stuff that is of little to no importance in the real world. Not only that but these youtube comment sections are sometimes filled with illiteracy and poor grammar that will be enough to make professors cringe and develop drinking problems. In fact, these sections can make anyone develop drinking problems due to the sheer stupidity, fanaticism, racism, and hatred that can be found within them. Usually, these people have little to no idea about what they're talking about and the stuff that comes out of their mouths sound like fanatical, zealous, radical bullshit. Avoid this place at all costs unless you want to lose some brain cells or to lose your faith in humanity.