do somebody/yourself a mischief

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do yourself a mischief

INFORMAL
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.
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