Conduct that playfully causes petty annoyance.
Drink led to mischief.
A playfully annoying action.
John's mischief, tying his shoelaces together, irked George at first.
(collective) A group or a pack of rats.
Harm or injury:
A cause or agent of annoyance, harm or injury, especially a person who causes mischief.
The Devil; used as an expletive.