Definition of "ringleader" []

• A person who leads others, especially in illicit or informal activities. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "They will also come into contact with a traveling carnival which also seeks out people with abilities and whose sinister ringleader is played by new cast member Robert Knepper (Prison Break)."
• "Notice the teabagger ringleader is obviously a huge Captain America fan."
• "All those mischievous gremlins populating the comic -- including the misbehavin 'ringleader "Not Me" -- deserve some serious CGI time on the big screen."