Insomniac since way back, see this is what I been like
Baking eggs and pancakes, eating that at midnight

from Lupe Fiasco – Go To Sleep Lyrics on Rap Genius

Meaning

Insomnia is an illness where someone has great difficulty sleeping. Lupe never sleeps, he’s always on the job. Midnight is the beginning of the morning. He’s baking eggs and pancakes at this time, why? Lupe is saying that he’s ahead of his time, and he is starting his day when everyone else is still sleeping.

It can also be seen as he doesn’t sleep, thus he has been a conscious rapper since he began his career. When you’re not asleep, you’re awake/conscious.

Finally, during the holy month of Ramadan, Muslims must fast during the day, thus many have a big meal in the middle of the night. Since Lupe is Muslim, he could be alluding to this as well.

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