If i may ask why would someone say something like that, that's obviously not a good thing, we are always taught, that the tongue can curse and can bless, so when we say some things, it's good that we analyze what we say before we say it otherwise you could end up regretting later on, and blaming yourself for something you could have avoided right from the start. I will say it's much of a curse than a prayer. For instance when you pray, you say good things that will elevate someone or make them feel loved and appreciated. Prayer is not meant to hurt someone's feelings, it's meant to encourage. When someone tells you, may your road be rough they are definitely not wishing you well, they are wishing you all the bad things you would think of, and really that's not right.