That writing gig might come to an end for the person who that this made was a common English expression:
The idiom is “the jig is/was up.” It means that the game or trick is over, done, kaput. The “gig was up” means that the job is over, done, kaput.
I don’t really think the writer’s gig is in jeopardy. This appeared in Yahoo! News‘ “The Sideshow,” where writers are not know for their journalistic integrity or mastery of English. Her job is safe there.