one-trick pony
noun /ˌwʌn trɪk ˈpəʊni/
/ˌwʌn trɪk ˈpəʊni/
(becoming old-fashioned, disapproving)- a performer who is only famous for one song, etc.; a person or business that is only good at doing one thing
- This comedian is no one-trick pony.
- For the first six years of its life the company was a one-trick pony. But what a trick!
- We were a one-trick pony before, and now we’re able to provide a full range of services.