crime committed for fun; criminal who enjoys the reaction
Refers to both the act and the perpetrator; often used for crimes like vandalism, hoaxes, or cyberattacks where the motive is amusement or attention rather than material gain.
The police believe this incident is the work of a criminal who did it for fun.
There was a series of prank calls by someone who enjoyed the reactions.
Compound of 愉快 (pleasure, fun) and 犯 (crime, criminal). The term likely emerged in modern Japanese to describe crimes motivated by amusement rather than profit or ideology.