Group items tagged

ONE HAS LATELY heard much of the hashtag. That is, the Twitter symbol #, used to categorize a tweet. Charlie Sheen's first tweet, for example, was famously: "Winning ..! Choose your Vice... #winning #chooseyourvice." #Winning has gone on to live in irony across the Twitterverse, in mockery of the eternally less-than-winning Sheen. But even President Obama recently urged students to tweet their senators about raising the interest rates on federally subsidized student loans with the hashtag "#DontDoubleMyRate." The new thing, however, is using the word "hashtag" in conversation. Especially if you are under a certain age, you may be catching people saying things like, "I ran into that guy I met-hashtag happy!" or, in response to someone complaining, "My flashlight app isn't working," perhaps you have heard the retort, "Hashtag First World problems!" A college student not long ago reported a favorite witticism to be appending observations with: "Hashtag did that just happen?