/b/sixpacksmackdown/posts/what-is-the-iifym-nutrition-plan-if-it-fits-your-macrosIIFYM is an acronym for a type of eating called "If It Fits Your Macros". Basically the theory behind this type of eating is that you can eat whatever you want as long as it fits within your macro-nutrient and caloric goals that you have se...en-USTelligent Community 11 Non-Production