A few that were new to me included:
tramp stamp: tattoo at the base of a woman's spineA number of people were into snowclones (see LanguageLog), like I'm in your X, Ying your Z – and the screen at the front of the room even had the 'verbing ur nounz' picture up for a while.
flog: fake blog started to promote a business
lactard: lactose intolerant person (apparently used by such people)
Tonight's the main event, the big vote ... and rumor has it there may be a Colbert-related motion on the floor.