This expression I encountered in La fille de la ville:
A few days ago, Flojindamesa over at Eat Drink Nola posted about Baru, a Caribbean/Tapas restaurant on Magazine Street. Of course after reading her post, Baader-Meinhof Syndrome set in and I saw Baru mentioned everywhere!
The meaning is obvious from the context; Wikipedia has more:
The “Baader-Meinhof phenomenon” was coined by a reader of the St. Paul Pioneer Press, Terry Mullen. The Minnesota newspaper runs a daily column called “Bulletin Board,” for which readers, using pseudonyms (in this case it was ‘Gigetto on Lincoln’), submit humorous or interesting anecdotes. The term was coined when Mullen submitted a story around 1986, about how he first heard about the terrorist group known as the Baader-Meinhof Gang and then heard about it again a short while later from a different source.
What term do Germans use for this phenomenon? After all, Baader-Meinhof is scarcely trivial information over here.