The internet term for posting insults or offensive language online is “flaming.” It describes hostile, aggressive, or insulting communication in forums, chats, email, comment sections, and social platforms.
Flaming became associated with early online communities such as Usenet newsgroups, where arguments could escalate rapidly. In the 1980s, users sometimes marked a heated passage with “FLAME ON” and “FLAME OFF,” echoing the Human Torch’s catchphrase in Fantastic Four stories. The 1983 Hacker’s Dictionary also recorded an earlier meaning involving rabid or incessant speech.
Flaming is related to, but not identical with, trolling. A troll commonly posts provocative material to trigger reactions, while a flamer may be genuinely angry or emotionally invested in the dispute. A prolonged exchange can become a flame war. Online anonymity, missing facial cues, and reduced accountability can intensify hostility, though research also emphasizes misunderstanding and perceived unfairness as causes.