high jinks 
plural noun
Boisterous fun: high jinks behind the wheel of a car...
- Dynamic duo Jackie Chan and Owen Wilson return for some more high jinks in this entertaining if fairly predictable action comedy sequel.
- Of course, teachers responded to his pranks and high jinks with wrath and hours of detention.
- Fears that two toddlers had gone missing from Leapfrog Nursery on Tuesday night turned out to be a case of high jinks when the children were found safe hiding in a cupboard.
Synonyms
antics, pranks, larks, escapades, stunts, practical jokes, tricks, romps, frolics;
fun, fun and games, skylarking, mischief, horseplay, silliness, foolish behaviour, tomfoolery, foolery, clowning, buffoonery
informal shenanigans, capers
British informal monkey tricks, monkey business
North American informal didoes
archaic harlequinades
Origin
Late 17th century: see jink.