The intense physiological effect of consuming too much sugar or glucose, usually in the form of cakes, cookies and soda; eating excessive amounts of sugar 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 drained or unnaturally tired. If ingested with large amounts of caffeine, such as in the form of chocolate or cola, the subject can also become jittery, experience mild heart palpitations or suffer from temporary insomnia.
"Last night I ate so much ice cream I was on a sugar high for hours..."
The ‘birthday present’ is shorthand, used to describe a particular song that carries certain notoriety for an artist or group. This song has come to define the band/artist, regardless of its age, quality or potential embarrassment. When performing live, this particular track is virtually expected; failure to perform the number will lead to grave disappointment or even bitterness from the crowd.
The ‘birthday present’ obtains its name through its special gift-like quality that, if not received, tends to cause resentment.
If Led Zeppelin came to town they’d just *have* to perform ‘Stairway to Heaven’, it’s their birthday present!