The phrase "can of corn" is a peculiar way of describing a simple pop fly catch in baseball. The spelling of the word "corn" in this phrase is unusual because of the final consonant cluster "rn." IPA phonetic transcription indicates that this final cluster is pronounced by touching the tongue to the alveolar ridge (behind the upper front teeth) while the vocal cords vibrate. It is a rare cluster in many languages and might explain why the phrase "can of corn" has sparked numerous debates on its origin and meaning.
A "can of corn" is a colloquial expression primarily used in baseball lingo to describe a routine, easily catchable fly ball hit by a batter. The phrase signifies a very simple or routine task that requires minimal effort or skill to accomplish. Originating from an old tale when canned corn was a popular grocery item, it refers to the ease of reaching up and plucking a can of corn from a high shelf.
In baseball, a "can of corn" is usually a high fly ball hit with little force, allowing the outfielder or an infielder positioned in the outfield to make an easy catch. It is associated with the idea that the ball is as easily attainable as a can of corn on a grocery shelf and poses no challenge to the fielder. When an outfielder signals that he can easily catch a fly ball by shouting "can of corn," it is an indication to his teammates and spectators that there is no need to worry about making the catch.
Beyond the baseball context, "can of corn" can be used metaphorically to describe any task, situation, or problem that is extremely uncomplicated or effortless. It denotes something that requires minimal effort, skill, or intelligence to accomplish successfully. Furthermore, it can be employed idiomatically to imply something that is predictable, expected, or routine. Therefore, "can of corn" has become a widely recognized expression outside of baseball to depict simplicity, easiness, and predictability.