A
chemical emitted by
the brain while writing code late at night. The more one
continues to code, the more awake one will feel despite the fact that it becomes further and further past one's bedtime.
Alice: So I was up coding
last night,
trying to finish that big project for Monday, and by the time I finished at 4:00am I just wasn't able to
go to sleep.
Bob: Yeah, that's the codeffeine.