When a task has been performed to a deplorable standard.
When something has been damaged completely.
Synonymous with: ruined, messed up, slaughtered, botched, bungled
(They changed my design to an unrecoverable extent)
My answer *should* be right.. ..unless of-course I've butchered the working somewhere...
(My answer should be correct unless I've made a mistake in my working to the problem)
Avondale College butchered those chaps from MAGS.
(The team from Avondale college soundly beat the team from Mount Albert Grammar School)