visibility whip n. a worker responsible for precisely orchestrating the presentation of placards, chants, and other demonstrations of support among delegates at a political convention, especially during speeches. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
In this bonus A Way with Words minicast, Martha and Grant step into the historic streets of Marblehead, Massachusetts, where the simple cry of “Down bucket!” could serve as a kind of local password. After they ponder that and other...