Similar to "the zone" or "the sweet spot"
Athletes are “in the butter zone” when they feel focused, energized, confident, and capable of maximal
performance in a seemingly effortless manner. Athletic “butter-zoning” requires the development of
athletic skills to the point that they are almost second-nature which, in turn, requires a strong
motivation to succeed.
A metaphorical state of being that one enters into when he/she is in a position where they cannot possibly fail at what would normally be considered an incredible task.
Friend: Dude, Mendenhall is on the 50 running for a touchdown and the closest guy is 30 yards behind.
The state one reaches after consuming just enough alcohol too be 'just drunk enough'. The ideal 'butterzone' is being one drink away from the alcohol having any negative effect. For example, puking, blacking out, or really bad hangovers.
Guy: Want another drink?
Me: Not yet, I'm riding in the butterzone and don't wanna fall out.
When a computer goes faster and faster until it's thought processes become a loop and in the infinite moment before it crashes it becomes self aware, that, my friend, is the butterzone. When Keanu comes back to life in the first Matrix movie, and everything slows down and the bullets stop, that is the butterzone.