Murphy's Law
n. joc. any of various maxims about the perverseness of things.
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Murphy's Law f17 [Murphy's Law] [ˌmɜːfiz ˈlɔː] [ˌmɜːrfiz ˈlɔː] noun (humorous)
a statement of the fact that, if anything can possibly go wrong, it will go wrong
Useful english dictionary.
2012.