From Longman Dictionary of Contemporary Englishfull-fatˌfull-ˈfat adjective British English DFfull-fat milk, cheese etc contains all the fat that is naturally in it → low-fat
Examples from the Corpus
full-fat• Cottage or other low-fat cheese can be substituted for full-fat cheese; skimmed and semi-skimmed milk for whole milk.• Cut down on all fats, particularly those from animal sources especially lard, suet, double cream and full-fat cheeses.• Some people thought they were ordering regular full-fat food, but ordered the lower fat items by mistake.• Before reaching for a celebratory pack of full-fat peanuts, a question strikes me: perhaps my level is too low?• The milk added to the cereal is probably ordinary full-fat silver top milk.• Dairy Whole milk and cream, full-fat yoghurt. 