In sports, what is said to be responsible when something bad happens or an in-game mistake occurs after a commentator has praised a player or commented on an achievement in progress. How could that fool use the word "shutout" with 10 minutes left to go? No wonder the goalie gave up a goal—it's the commentator's curse! They single out his stellar play, and then he misses a big catch. Typical commentator's curse.
See also: curse
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.