There is no such thing as spot reduction is what this myth is referring to. Your body cannot spot reduce fat in specific locations. If you have problematic areas in your arms or stomach, doing thousands of bicep curls and thousands of crunches won’t help.
We are all different and our bodies are predisposed to storing fat in certain locations in a certain order.
When you start to lose weight, your body will lose the fat you currently have in a certain order as well – it might come off your arms first, then your legs, then your belly, then your chest, and then your butt. Or in a different order, depending on your personal genetic makeup. It’s different for every person.