"Energy slump" refers to a period of low energy or fatigue. It describes a state where a person feels tired, without enough motivation to do things, and lacking the usual level of energy to perform tasks. Full definition
Almost every office worker is familiar with the afternoon energy slump after eating sandwiches for lunch, and eating too many carbohydrates is the cause of it. (supernaturalacnetreatment.com)
It's the ideal treat to satisfy chocolate cravings and help you beat the 3 pm energy slump. (superchargedfood.com)
So when your blood sugar dips again, you need more carbs again, or you'll have a major energy slump. (truthaboutabs.com)