A response to conversation that is either above or below Abby's means of exchanging information; an immediate dismissal of all relevant points to try and save face as per damage control. An example might include:
Someone in chat... "Mathematics is the core of modern science because..."
Abby... "PEAK DISCOURSE"
This usually means the conversation has made her uncomfortable as she cannot refute or rebut the argument by linking Wikipedia pages.
Once peak discourse has been established, it's almost impossible to present a rebuttal unless a user can provide peer reviewed articles from at least 20 non-cis male sources.