Kopfkino 

vivid imagination/daydream; for example a literary scene or a conceivable development of the future with its risks and opportunities

A good writer stimulates the kopfkino of his reader.

Kopfkino by SomeEnglishGuy November 25, 2020

Kopfkino 

Kopfkino happens when you involuntarily use your imagination to think of troubling or disgusting things in graphic detail.

From the german words kopf, head and kino, cinema.

After i heard 'granny pussy' i had the most disgusting kopfkino.

Kopfkino by Yorik Schwarz July 18, 2010