A complete obsession or absorption in a subject or hobby to a point where a person appears to completely tune out their surroundings and where the person repeatedly returns to said subject or material.
A quaint and fanciful idea; a whim; playfully odd behaviour.
An impulsive, illogical or capricious character.
A jigsaw puzzle piece that has been cut into a recognizable shape, as if on a whim; often the shape is representative of the theme of the image used for the puzzle.
A whim (capstan or vertical drum).
To fill with whimsies or whims; to make fantastic; to craze.