In computer gaming:
Noun: A solution
to a level or puzzle
that the designer
overlooked, especially if it is simpler than the official solution
Verb (transitive): To solve a level or puzzle
in a way that the designer
did not intend, often using a relatively straightforward method, but not by cheating.
I had to revise my map design because of a backroute that had been discovered.
I thought I had designed
the hardest level ever, only for someone
to backroute it.