Definition: (noun) Reckless or malicious behavior that causes discomfort or annoyance in others.
Synonyms: mischief, devilment, roguery, devilry, mischievousness, rascality.
Usage: Mr. Jones had had enough of Billy's shenanigans and sent him to the principal's office in the hopes that she would be able to straighten the unruly student out.
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Source: The Free Dictionary