answer:I reserve “first world problems” for things that are truly trivial – that is, the fact that this is what you consider a “problem” shows your privilege. “I missed hot yoga class because the guys building my new marble countertop were ten minutes late”. That’s a first world problem. Not being able to find gluten free, dairy free, nonfat, organic carob cake on a grocery store shelf is a first world problem. A pediatrician firing you as a patient because you are afraid to vaccinate your kids against preventable illness is a first world problem.