dead beat—(also: dead beaten) extremely tired:
- It took me a very short time to get between the blankets, and soon I was asleep, for I was dead beat after my ride.
deadbeat—(sl.)
1. an idler who is not working or looking for a job:
- Al was a deadbeat barely on the right side of the law, who hadn’t had a job in six years.
2. smb. who persistently fails to fulfill his obligations or pay his debts:
- Wilson was a deadbeat who lived the end of his life running from creditors.