Sod's Law

Từ điển Oxford Advanced Learner 8th

ˌSod's ˈLaw [Sod's Law] BrE NAmE noun uncountable (BrE, humorous)
the tendency for things to happen in just the way that you do not want, and in a way that is not useful
•We always play better when we are not being recorded— but that's Sod's Law, isn't it?
•It was Sod's Law— the only day he could manage was the day I couldn't miss work.