The phrase "grams fat" refers to the amount of fat content in a food item or a meal. It is a way to measure how much fat you are consuming. Full definition
Bulking - 1 gram protein per pound of bodyweight; 2 grams carbs per pound of bodyweight;.4 grams fat per pound of bodyweight (paleocajunlady.com)
I went on a «version» of the Keto diet — per day goals: 35 net carbs / 85 -95 grams protein / 35 -40 grams fat. (drjockers.com)
Fat provides our bodies with energy, and while gram for gram fat has twice as many calories as carbohydrates and protein (9 calories per gram for fat versus 4 calories per gram for carbs and protein), you can't live without it. (californiaavocado.com)