carbo loading
From Longman Dictionary of Contemporary Englishcarbo loadingcar‧bo load‧ing /ˈkɑːbəʊ ˌləʊdɪŋ $ ˈkɑːrboʊ ˌloʊ-/ noun [uncountable] informal when athletes eat food that contains a lot of carbohydrates as part of their preparation for a race etc, so that their muscles will have extra energy during the event —carbo load verb [intransitive]