[WPI] 1. To persist in discussing a specific subject.
2. To speak authoritatively on a subject about which one knows
very little.
3. To complain to a person who is not in a position to correct
the difficulty.
4. To purposely annoy another person verbally.
5. To evangelise. See
flame.
6. Also used to describe a less negative form of blather, such
as friendly bullshitting. "Rave" differs slightly from
flame in that "rave" implies that it is the persistence or
obliviousness of the person speaking that is annoying, while
flame implies somewhat more strongly that the tone or
content is offensive as well.