The act of letting the other bloggers know you're finished with your rant. Derived from HTML code in which the rant block would have begun with <rant> and finished with </rant>.
Dougman25: Hey, Bill. How was your day?
Billosaurus17: Well I got totally cut off in traffic and then some asshole spit in my Big Kahuna Burger, my cat has rabies, I pretty much hate everyone in the world. Sorry. </rant>