do a mischief



do yourself a mischief

  (British & Australian humorous)
if you tell someone they will do themselves a mischief if they do something, you mean they will hurt themselves You want to be careful jumping over spikes like that - you might do yourself a mischief!
See also: mischief

Common Names:

NameGenderPronouncedUsage
Ujarak-Native American, Inuit
Iverson['aivəsn]
CashKASHEnglish
Ehud-Biblical, Hebrew, Biblical Hebrew
MarÍAmah-REE-ah (Spanish)Spanish, Galician, Icelandic
HellenHEL-ənEnglish