The phrase "Annushka has already spilled the oil" is a famous line from Mikhail Afanasyevich Bulgakov’s novel "The Master and Margarita" (1928-1940).
In the novel, the phrase carries a mystical significance tied to the predetermination of fate. Early in the book, Woland (Satan) strikes up a conversation with the writer Berlioz at Patriarch’s Ponds and calmly predicts that Berlioz is about to lose his head — and, when pressed for his reasoning, explains only that a woman named Annushka has already bought a bottle of sunflower oil and, in the course of things, already spilled it, so that whatever meeting Berlioz was planning to attend isn’t going to happen after all.
Later in the novel, the prediction is explained: Berlioz slips on the tram tracks on that very puddle of spilled sunflower oil, falls under a passing streetcar, and dies.
This scene gave Russian a lasting catchphrase, used to signal the inevitability of fate, or to hint that certain events are already predetermined and unavoidable.
In contemporary usage, the phrase "Annushka has already spilled the oil" is often used as a metaphor for the idea that some irreversible process has already been set in motion and can no longer be stopped.