do somebody/yourself a mischief

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.See also: mischief

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.See also: mischief

do yourself a mischief

INFORMALIf 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.See also: mischief

ˌdo somebody/yourself a ˈmischief

(British English, informal or humorous) hurt somebody/yourself: You could do yourself a mischief wearing such tight trousers!See also: mischief, somebody