since when do CIA analysts use the word diss?

[day214]

"But looking at what the President has been saying about Iraq and looking at the way they are dissing already the Baker-Hamilton report as just one of the inputs into the situation suggests to me that Cheney is still very much in control and that Gates’s modus operandi will be to become Cheney’s best friend and write memos, as he did for Bill Casey."

just crazy or even crazier than the metaphor of a self-licking ice cream cone in the preceding paragraph to describe the bush administration?
i love this guy

if you're curious the source: http://www.democracynow.org/article.pl?sid=06/12/05/1452228