If the worst comes to the worst
Definition 1 of 1
Pro Tip 1/3Worst-case Plan
Used to describe a backup plan for the worst possible scenario. 
If the worst comes to the worst, we'll postpone the wedding.
Pro Tip 2/3Emotional Prep
Expresses readiness for a negative outcome, showing emotional preparation. 
If the worst comes to the worst, we are mentally prepared to start over.
Pro Tip 3/3Not Expected
Implies the scenario is not expected but considered as a possibility. 
We don't foresee any issues, but if the worst comes to the worst, we'll handle it.