Mur‧phy’s law /ˌmɜːfiz ˈlɔː $ ˌmɜːrfiz ˈlɒː/
noun [uncountable] informal especially American English[
Date: 1900-2000;
Origin: Edward Murphy (born 1917), U.S. engineer who first thought of it]
a tendency for bad things to happen whenever it is possible for them to do so – used humorously
Synonym : sod’s law British English [TahlilGaran] Dictionary of Contemporary English ▲