(Internet slang) a “sickness” in teenagers characterized by sophomoric, edgy, and/or pretentious behavior (trying too hard to be special in unusual ways)

synonym of 山車 Etymology 1, above / a wooden cart that appears spontaneously without being made by man as an auspicious sign of the time of peace and tranquility

(education) honors student

theater closure, stage absence / absence from a tournament, especially of sumo