joke jail
n.— «Joke jail—Plebes can be required by upperclassmen to tell jokes; if the jokes are poor, the plebe must hold his fork in front of his face as if speaking through jail bars.» —“A look at the lingo used by the mids; Source: Brief Points: An Almanac for Parents and Friends of U.S. Naval Academy Midshipmen” in U.S. Naval Academy The Capital (Annapolis, Md.) May 22, 2005. (source: Double-Tongued Dictionary)
Further reading
The adjective corny describes someone or something “unsophisticated” or “naive.” This sense of corny goes back at least as far as the 1920s. Seed catalogs of the time often contained bits of goofy jokes and broad humor...