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Related to mischief: Mischief night
do (oneself) a mischief
To do something that harms oneself. Primarily heard in UK, Australia. I think you'll do yourself a mischief if you try that risky skateboard trick.
do (one) a mischief
To do something that harms one. Primarily heard in UK, Australia. You sure did your brother a mischief by including him in that dangerous game.
To cause naughty, playful trouble. Their parents are both big practical jokers, so all of the kids love to make mischief themselves. He's always making mischief with the interns and new employees.
to cause trouble. Bob loves to make mischief and get other people into trouble. Don't believe what Mary says. She's just trying to make mischief.
Cause trouble, as in Don't listen to her gossip-she's just trying to make mischief. This idiom was first recorded in 1884, but the related noun mischief-maker, a person who causes trouble especially by tale-bearing, dates from about 1700.
do yourself a mischiefINFORMAL
If you do yourself a mischief, you injure part of your body. I think I'd do myself a mischief if I tried to copy any of her dance moves.