A concert transmitted via cell phone. A "cellcert" happens when a person dials a friend and hold up his or her cell phone so the friend can enjoy the show.
For example, let's say that Natasha is at a Madonna concert. By prearrangement, as the concert begins, she makes a cell phone call to her friend Tina. As Madonna walks out on stage, Natasha begins narrating what Madonna is wearing, what she is saying, how the crowd is reacting, and so on. Meanwhile Tina is busily typing a version of the narration onto an online Madonna fan site, so a virtual audience around the world can experience the next best thing to being there.
NetLingo Classification: Online Jargon