one-trick pony

US /wʌn-trɪk ˈpoʊ.ni/
UK /wʌn-trɪk ˈpoʊ.ni/
"one-trick pony" picture
1.

satu trik saja, orang yang hanya punya satu keahlian

a person or thing that has only one special ability, skill, or area of expertise

:
He's a talented singer, but he's a bit of a one-trick pony, only performing ballads.
Dia penyanyi berbakat, tapi dia agak satu trik saja, hanya menampilkan balada.
The new software is a one-trick pony; it only does one thing well.
Perangkat lunak baru ini satu trik saja; hanya melakukan satu hal dengan baik.