A: Steve is acting a little crazy. What’s up with him?

B: He’s been drinking soda all day and must have got a sugar high.

Note: This phrase desribes the crazy surge of energy one gets after having a large amount of sugar, similar to getting high but not as dangerous. Eating excessive amounts of sugar, usually in the form of cakes, cookies and soda, makes the brain release dopamine and endorphins, often inducing a mild sense of euphoria and happiness. This is often accompanied by a strong surge of energy as the sugar hits the bloodstream. Sugar highs often only last an hour or two, and as the level of glucose in the blood lowers it can often leave the subject feeling tired.