worm poll
n.— «Those who like nothing better than an evening watching The West Wing know the format. Voters turn a dial to say if they are pleased, indifferent or hostile as they listen to a speech. A “worm poll” describes the lines which slither across the screen to record their instant reaction.» —“Breaking the code” Guardian (U.K.) Apr. 11, 2005. (source: Double-Tongued Dictionary)