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1 definition by Sah amm

 
1.
Baader-Meinhof is the phenomenon where one happens upon some obscure piece of information– often an unfamiliar word or name– and soon afterwards encounters the same subject again, often repeatedly.

when you hear a word or name which you just learned the previous day, and it feels like more than a mere coincidence
If you hear something about Baader-Meinhof within a few days of reading this, that would be experiencing "baader-meinhof"

"what the hell i just heard that yesterday this is that baader meinhof shit"
by Sah amm February 06, 2007