Much like turkey basting. Allowing someone you hate to continue on a diatribe, through provocation, so that you can insult them with more fury.
Idiot: (Race of people) suck.
You: Please continue, I am interested.
Idiot: Well, (Race of people) are so ignorant and stupid.
You: That is very insightful, please tell me more.
Idiot: I just can't stand (Race of people), they hold me back in my personal endeavors because (Reasons).
You: Verbal Annihilation=(Rage)x(Number of responses)
The more rage basting = More rage.