Corpsing is British theatrical slang for unintentionally breaking character by laughing. In North American TV and film this is generally categorized as a blooper. The origin of the term corpsing is unclear, but may come from (provoking an actor into) breaking character by laughing while portraying a corpse.
A significant aspect of the phenomenon is the frequently deliberate and usually benign attempts among actors to cause this in cast members. During the "Pete and Dud" sketches in the BBC comedy series Not Only... But Also, Peter Cook would deliberately ad lib in an attempt to make Dudley Moore corpse—and invariably succeeded.
Corpsing is not exclusive to the theatre. One of the most famous examples of this is on the cricket programme Test Match Special in the famous "leg-over" incident and another cricket commentary in which it was noted that "...the bowler's Holding, the batsman's Willey."
One of the most famous American examples of comedy partners trying to "corpse" is between Tim Conway and Harvey Korman during The Carol Burnett Show. Similarly, during production of the American situation comedy, Mork and Mindy, Pam Dawber often found it impossible to maintain the proper composure in character at the sight of co-star Robin Williams' hailed comic improvisations during filming and her amused reaction is visible on aired episodes. Mindy Cohn of The Facts of Life fame also had troubles keeping a straight face during scenes and can be seen smiling as if she was quite amused throughout the series run. The Saturday Night Live sketches featuring Debbie Downer (Rachel Dratch) are also notable for corpsing, as well as the famous Stefon (Bill Hader), who only went on one occasion without corpsing throughout his entire five-year stint.
The Irish sitcom Mrs. Brown's Boys regularly features Agnes Brown (Brendan O'Carroll) ad libbing lines to make other cast members corpse. These incidents are intentionally left in the episodes for effect.
- arts.guardian.co.uk: "A greasepaint glossary", article on theatrical terms
- Peter Cook: A Biography, Harry Thompson, Hodder and Stoughton, 1997
- BBC Sport: Test Match Legends - Brian Johnston
- Warren, Dan (16 January 2003). "A breeze for Blowers". BBC Sport (British Broadcasting Corporation). Retrieved 24 September 2012.