Ideo- definition, a combining form representing idea, in compound words: ideology. See more.
On The Dark Side by John Cafferty & the Beaver Brown Band. This was written for Eddie and the Cruisers, a 1983 movie about a New Jersey bar band. In the film, the song becomes the band's big hit and leads to a second album and a conflict with their record company. Kenny Vance was the music supervisor on Eddie and the Cruisers.
More good examples would be Belarus and Russia, from Axis Powers Hetalia, or Hatsune Miku and Megurine Luka in the song Scissorloid. Yandere can also be shown in movies such as Hedra Carlson in Single White Female. Sometimes, they can just be played in a comedic, usually exaggerated, context.