Clustertweet Share definition Flag Writing a lot of tweets on Twitter in a short period of time. First defined by comedian Chris Addison on Feb 2nd 2009. Aw, no, nothing all day and then everyone starts with the clustertweets. Clustertweet by typing police February 2, 2009 0 0 Get merch Get the Clustertweet mug. Buy Now — $32.95 See more merch