adjective
bushed
BOOSHT/bʊʃt/
Very tired.
The young man looks bushed as he slumps on the bench after exercise.

Etymology
Bush also came to mean uncleared country. Bushed may have developed from “lost in the woods” to “exhausted,” though that link is uncertain.
More examples
- We were too bushed to cook dinner.
- The long hike left everyone bushed.
- He looked bushed after the overnight shift.
Forms
bushed
Similar words
- exhausted
- A neutral equivalent, while bushed is informal.