car ‧ bo load ‧ ing /ˈkɑːbəʊ ˌləʊdɪŋ $ ˈkɑːrboʊ ˌloʊ-/ BrE AmE noun [uncountable] informal
when ↑ athlete s eat food that contains a lot of ↑ carbohydrate s as part of their preparation for a race etc, so that their muscles will have extra energy during the event
—carbo load verb [intransitive]