Baader-Meinhof phenomenon

[ bah-der-mahyn-hof fi-nom-uh-non, ‐nuhn ]
/ ˈbɑ dərˈmaɪn hɒf fɪˌnɒm əˌnɒn, ‐nən /

noun

the seemingly sudden awareness of encountering a word, phrase, fact, or thing that one has only recently learned of.

Origin of Baader-Meinhof phenomenon

First recorded in 1990–95 in a discussion thread in the St. Paul Pioneer Press (St. Paul, Minnesota) by a participant who had heard the name twice in close succession; named after the Baader-Meinhof Gang or Baader-Meinhof Group, a West German far-left terrorist group founded by Andreas Baader (1943–77) and Ulrike Meinhof (1934–76), and active in 1970–98

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019