rave vi.
[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 evangelize. 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.