Flaming is saying mean, nasty, or embarrassing things about someone else online. This often happens because it can be hard to understand the message someone is trying to communicate without getting their non-verbal communication.

Sometimes flaming happens by trolls who are trying to pick a fight online.

Flaming often ends up in a back-and-forth exchange between two users called a flame war--they both say awful things about the other person. It is practically impossible to "win" a flame war. Sometimes flame wars spill over into face-to-face fighting as well. Flaming is one form of cyberbullying.