To make (someone) work too hard.
to overwork a horse
To work too hard.
To fill too full of work; to crowd with labour.
To decorate all over.
Subjected to too much work.
Overworked and underpaid? Then quit your job and become a pro darts player.
(of a word, phrase, etc.) Having been overused such that it has lost its meaning; trite; banal.
overworked, unaffecting cliches