Merriam-Webster defines a flame, in this sense, as an angry, hostile, or abusive electronic message. [1] Flamebait is the post put out to catch some.
The compound itself is not in the dictionary. Merriam-Webster, Collins and Dictionary.com were all checked and none carries an entry, so the definition at the top of this page is ours rather than anyone's.
Why it works
The reply is the product. A post that makes a hundred people angry has done its job a hundred times over, and each response is both the evidence that it worked and the mechanism that spreads it.
It is also cheap to make and expensive to answer. Selecting a claim for its capacity to enrage takes no expertise in the subject, while a considered reply requires actually knowing something — an asymmetry that holds no matter how wrong the original post is.
And it is self-justifying. Anger in the replies can be presented as proof that the post touched something true, so the reaction the post was designed to produce becomes an argument in its favour.
What it looks like
- The claim is stated in its most provocative available form, with no working shown
- It arrives in a place chosen for maximum objection rather than agreement
- The poster engages with outrage but not with the substance of any reply
- Corrections are met with amusement rather than defence
- The same account produces the same shape of post repeatedly
Every one of these has an ordinary explanation. Some people are simply blunt. Some sincerely held views really are unpopular in the room they are said in. Being unbothered by criticism is not proof of insincerity, and a person who posts strong opinions often is usually just a person with strong opinions.
The honest difficulty
The definition turns on a purpose, which is not a thing you can see.
Everything observable about flamebait is also true of somebody being provocative and sincere. They write the same post. They may even welcome the same argument. The only difference is what they wanted, and the only evidence available to you is how the post made you feel — which is exactly the evidence that is unreliable, because a post that genuinely offends you and a post engineered to offend you feel identical from where you are sitting.
So the word is worth using about a pattern and not about a person's single post. And it is worth noticing that "that's just flamebait" is a serviceable way to avoid an argument you would rather not have with someone who meant it.
What to do
This is the case the folk advice was written for, and one of the few places on this site where it applies more or less as given. If the anger is the product, declining to supply it is a real answer.
Do not reply angrily, and consider not replying. Not because your objection is wrong, but because an angry reply is the thing being farmed. There is no version of it that costs the poster anything.
If something factual needs correcting, correct it once, flatly. Write it for the people reading rather than for the poster, who is not the audience and did not ask.
Leave the thread rather than the platform. A single post has no claim on your evening. If a place produces this constantly, that is a fact about the place worth acting on separately.