overactive imagination; tendency to get lost in one's imagination
Refers to a habitual tendency to indulge in unrealistic fantasies or daydreams, sometimes with a slightly negative or clinical connotation.
He has an overactive imagination and often can't tell reality from fantasy.
その作家の妄想癖が、独特の世界観を生み出している。
The writer's tendency to get lost in imagination creates a unique worldview.