noun (used with a plural verb) Informal.
- boisterous celebration or merrymaking; unrestrained fun: The city is full of conventioneers indulging in their usual high jinks.
- lively enjoyment
Playful or rowdy activity, often involving mischievous pranks. For example, All sorts of high jinks go on at summer camp after “lights out.” About 1700 this term denoted a gambling game accompanied by much drinking, but by the mid-1800s it acquired its present meaning.