A heckler is a person who harasses and tries to disconcert others with questions, challenges, or gibes. Hecklers are often known to shout discouraging comments at a performance or event, or to interrupt set-piece speeches, with the intent of disturbing performers and/or participants.
A heckler in Washington, D.C., leans across a police line toward a demonstration of Iranians during the Iran hostage crisis, August 1980.
Statler and Waldorf are a pair of Muppet characters from the sketch comedy television series The Muppet Show, best known for their cantankerous opinions and shared penchant for heckling. The two elderly men first appeared in The Muppet Show in 1975, where they consistently jeered the entirety of the cast and their performances from their box seats.
Waldorf (left) and Statler (right)
Image: Hotel Pennsylvania, NY (external view, ca 1919)
Image: St Bartholomews and The Waldorf Astoria Hotel