“My impression is that many people don’t have any idea of what ‘literally’ means - or used to mean,’’ says Jean Berko Gleason, a psycholinguist at Boston University. “So they say things like ‘He was literally insane with jealousy.’ If in response, you asked them if this person had been institutionalized, they’d look at you as if you were the crazy one. The new ‘literally’ is being used interchangeably with words such as ‘quite,’ ‘rather,’ and ‘actually.’ ’’
The debate over the misuse of the word can be traced to the 18th or 19th century (depending on whom you ask), and the abuse began gathering legitimacy by 1839, when Charles Dickens wrote in “Nicholas Nickleby’’ that a character “had literally feasted his eyes in silence on his culprit.’’