What “!” can mean in computer programming

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NOT.

Last seen on: NY Times Crossword 18 Jul 19, Thursday

Random information on the term “NOT”:

… Not! is a grammatical construction in the English language used as a function word to make negative a group of words or a word. It became a sardonic catchphrase in North America and elsewhere in the 1990s. A declarative statement is made, followed by a pause, and then an emphatic “not!” adverb is postfixed. The result is a negation of the original declarative statement.

According to the above, the phrase, “He is a nice guy… not!” is synonymous to “He is not a nice guy”. Whereas the latter structure is a neutral observation, the former expresses rather an annoyance, and is most often used jocularly.

One of the earliest uses was in the Princeton Tiger (March 30, 1893) 103: “An Historical Parallel– Not.” In 1905, it was in Dream of the Rarebit Fiend by Winsor McCay. A 1918 instance was “I am darn sorry not to be able to help you out with the News Letter, but in me you have a fund of information—NOT.”

Popularized in North America in the 1990s by a Saturday Night Live skit and subsequent movie Wayne’s World, “not” was selected as the 1992 Word of the Year by the American Dialect Society.

NOT on Wikipedia