do (oneself) a 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

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