A malapropism (also called a malaprop or Dogberryism) is the use of an incorrect word in place of a word with a similar sound, resulting in a nonsensical, sometimes humorous utterance. An example is the statement by baseball player Yogi Berra, "Texas has a lot of electrical votes", rather than "electoral votes". Malapropisms often occur as errors in natural speech and are sometimes the subject of media attention, especially when made by politicians or other prominent individuals. Philosopher Donald Davidson has noted that malapropisms show the complex process through which the brain translates thoughts into language.
Humorous malapropisms are the type that attract the most attention and commentary, but bland malapropisms are common in speech and writing.
The word "malapropism" (and its earlier variant "malaprop") comes from a character named "Mrs. Malaprop" in Richard Brinsley Sheridan's 1775 play The Rivals. Mrs. Malaprop frequently misspeaks (to comic effect) by using words which don't have the meaning that she intends but which sound similar to words that do. Sheridan presumably chose her name in humorous reference to the word malapropos, an adjective or adverb meaning "inappropriate" or "inappropriately", derived from the French phrase mal à propos (literally "poorly placed"). According to the Oxford English Dictionary, the first recorded use of "malapropos" in English is from 1630, and the first person known to have used the word "malaprop" in the sense of "a speech error" is Lord Byron in 1814.
The synonymous term "Dogberryism" comes from the 1598 Shakespeare play Much Ado About Nothing in which the character Dogberry utters many malapropisms to humorous effect. Though Shakespeare was an earlier writer than Sheridan, "malaprop/malapropism" seems an earlier coinage than "Dogberryism", which is not attested until 1836.