Ordinary sensible understanding; one's basic intelligence which allows for plain understanding and without which good decisions or judgments cannot be made.
An amusing story.
The root cause or main issue, especially an unexpected one
A laughably worthless thing or person; a sham.
Something that is far easier or far less challenging than expected.
Something said or done for amusement, not in seriousness.
To do or say something for amusement rather than seriously.
To dupe in a friendly manner for amusement; to mess with, play with.