Synonyms of 'high jinks'
fun and gamesDictionary, sport, spree
You can refer to playful behaviour as fun and games, especially if you disapprove of it because you think it is irresponsible.
Their annual parties are notorious for high jinks.
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Thesaurus for high jinks from the Collins English Thesaurus
High jinks is lively, excited behaviour in which people do things for fun .