Buggered
Australian SlangDefinition
Mildly vulgar Australian slang: extremely tired or worn out; also, broken or ruined; and used idiomatically to express frustration or ignorance.
Examples
"After that 10-hour shift in the sun, I'm absolutely buggered."
"The old ute's gearbox is buggered again, so we'll have to take it to the mechanic."
"Buggered if I know where I left my sunnies, they were here a minute ago."