know your stuff
US /noʊ jʊər stʌf/
UK /noʊ jʊər stʌf/
1.
tahu bidangnya, sangat mahir
to be very knowledgeable and skilled in a particular area or subject
:
•
You can trust her advice; she really knows her stuff when it comes to financial planning.
Anda boleh percayakan nasihatnya; dia benar-benar tahu bidangnya dalam hal perancangan kewangan.
•
The new mechanic clearly knows his stuff; he fixed the engine in no time.
Mekanik baru itu jelas tahu bidangnya; dia membaiki enjin dalam sekelip mata.