mischief

noun

1. 1

   Conduct that playfully causes petty annoyance.

   “Drink led to mischief.”

2. 2

   A playfully annoying action.

   “John's mischief, tying his shoelaces together, irked George at first.”

3. 3

   (collective) A group or a pack of rats.

4. 4

   Harm or injury:

5. 5

   A cause or agent of annoyance, harm or injury, especially a person who causes mischief.

6. 6

   The Devil; used as an expletive.